As you may read here:
…
According to the Tails site:
https://tails.boum.org/contribute/calendar/
"Calendar
All times are referenced in UTC.
2022 Q2
2022-06-03 (hopefully): Release 5.1 (Firefox 91.10) — intrigeri is the RM, nodens is the TR"
…
As it says, it “(hopefully)” will drop sometime today.
I have no comment about your question re: Parrot Linux, but the solution to the Tails 5.0 issue will be fixed in Tails version 5.1.
My apologies for posting this info in two separate threads. I don’t like clutter and assumed people read my thread re: 5.0/5.1 which is why I posted an update there about the delay.
Edit: I have no ties to the Tails project or insider knowledge.