What are some of the things they should make inaccessible to themselves?

As would any company. They are bound by their local laws.

I appreciate this perspective and that was also my immediate reaction. Then I realized, as long as I can easily export my data and move elsewhere, I shouldn’t be too concerned.

This is only good news for the people at Skiff that are getting paid. Skiff is dead.

For what it’s worth, there are some options on flathub.org even if they aren’t official.

I switched to 2FAS.

You can’t export from FreeOTP. Ente doesn’t appear to be open source. Tofu is an option but I’m afraid it might not be maintained.

Edit: Use Ente. It’s the best option.