Right. Like I said, they have been forced to go through Rome. And there is no freedom to authorize new groups:
Art. 3. The bishop of the diocese in which until now there exist one or more groups that celebrate according to the Missal antecedent to the reform of 1970:
[...]
§ 6. to take care not to authorize the establishment of new groups.
Art. 4. Priests ordained after the publication of the present Motu Proprio, who wish to celebrate using the Missale Romanum of 1962, should submit a formal request to the diocesan Bishop who shall consult the Apostolic See before granting this authorization.
------
To the proposed question:
Does the diocesan Bishop have to be authorised by the Apostolic See to allow priests ordained after the publication of the Motu Proprio
Traditionis custodes to celebrate with the
Missale Romanum of 1962 (cf.
Traditionis custodes, n. 4)?
The answer is:
Affirmative.