My sense is that it is true that the Episcopal church in America is more consistently high church than here, but I don't know that it's true that Anglicanism in Australia is more low church than the UK. I think there is enormous diversity of churchmanship in both countries.
Side note, but on Thursday/Friday I was away at a clergy event, and Thursday marked the feast of the birth of Mary, Mother of our Lord. Which meant a Marian focus to our Eucharist and prayer services. I'm now in a more catholic diocese than I came from, or am used to, and I had real difficulty with some of the hymns chosen and things said in that situation. So experiences like that might also colour my answer!
Indeed, you strike me as being an extremely doctrinally orthodox, strict 39 Articles sort of Anglican. And in the US we do have some continuing Anglican churches like that, and in some regions Low Church Anglicanism which is so low church that Morning Prayer is preferred to the Eucharist was reported to me as existing in some parts of Virginia by one Episcopalian priest.
You might well be right about the UK and AU having a balance of churchmanship. The reason why I speculated Australia was less high church was due to a combination of the 39 Articles being in effect and the largest city, Sydney, being extremely low church, but Australia is an entire continent and perhaps it makes more sense to consider each archdiocese in its own context?
I would be interested to know what the most Anglo Catholic churches are in your opinion in Australia, by the way.
To me it seems natural that Anglo Catholics would go after people who were hurt by Traditiones Custodes, because even in England you historically had in addition to Prayer Book Catholics a related group known as Missal Catholics, who used English translations of the Missale Romanum. And Anglicanism was not subject to Vatican II and more specifically, the Novus Ordo Missae, and so at Anglican churches, while some cathedrals in the UK, indeed a great many, have placed communion tables in front of the Chancel, others still use the High Altar, and Ad Orientem services are still a thing, whereas that is extremely rare in the Roman Rite, even if it is allowed. What is uncommon is seeing an altar constructed immediately in front of another altar so as to facilitate Ad Orientem worship as in many Roman Catholic churches.
Also the Liberal Catholic faction in the Episcopal Church and some other Anglican jurisdictions has appealed to people who objected to certain doctrinal decisions of the Roman church, for example, not ordaining women, but who like Roman Catholic liturgy. Conversely, you have Anglicans who went the other way and became Catholic or Orthodox.
I could link you to some videos of ultra high church services in London and the US and some Tridentine masses for comparison, because the similarity is remarkable. If one did not speak English, one might think they were celebrating the same liturgy in some cases.
As you know I am a big fan of Rev. Percy Dearmer, who was high church, but also wanted a distinctly Anglican identity, including the use of traditional Anglican altars, derived from those of the Sarum Rite, in use until 1552, which actually look quite different from their Roman Rite counterparts. So he did not want to see more than two candles on the altar, for example. His book, The Parson’s Handbook, is interesting because it outlines beautiful ways of celebrating the different liturgical services in the BCP. If it were more widely followed by Anglo Catholics, some disaffected former Tridentine mass attendees might convert but the services would look quite different.
By the way, I find it interesting that a higher percentage of chancel screens survived in the UK than in the Continent, because the Anglican church had for some time a policy of retaining the chancel, whereas the Dominicans and Franciscans wanted to get rid of chancel and rood screens. Speaking of which, I think there are two authentic rood screens left in the C of E. There is an interesting chapter on church architecture in the Oxford Guide to the Book of Common Prayer, which is a thrilling book in all respects.