How do I determine release version of arduino-esp32 used in latest framework-arduinoespressif32?

If the fork works for you, it works for you.

One of the maintainers for the pioarduino fork is also a maintainer of Tasmota, who has very much an interest in this thing working, as Tasmota is very popular. So personally, I would say it’s a good fork.

There has been no movement on the Espressif side to come to an agreement with PlatformIO since this comment.