The word everyday is not included in
Isaiah 66:23. This would be mean the saved would be gathering before the Lord 24/7 for worship when scripture tells us the saints will be building homes and tending to vineyards, so this interpretation is another way to sadly explain another Sabbath verse away, instead of accepting it for what it really says.
And it shall come to pass
That from one New Moon to another,
And from one Sabbath to another,
All flesh shall come to worship before Me,” says the Lord.
I go to church from one Sabbath to another, I do not go to church daily. Just like now, not every day is the Sabbath, no work 24/7 would be impossible and God's will for us on earth is not different for us in heaven.
That's good, I was only mentioning that because you said the majority of people don't keep the Sabbath, like that is who we follow - over God's Word that says the Sabbath is one of God's commandments that He wrote and He spoke and is in His heavenly Temple Revelation 11:19 , the day God set aside for holy use and blessed. God deemed all days except the Sabbath as working days. Exodus 20:8-11
The commandment is to keep the Sabbath day holy Exodus 20:8 do you not think our worship to God is holy on the day He sanctified and blessed for holy use? Do you think the day set aside to honor God Isaiah 58:13 is different than worship?