Correspondence Games With Unlimited Time Control

I have an open correspondence game against an anonymous account with an unlimited time control. My opponent is down a Rook with no compensation and will not resign. I would really like to analyze the game on Lichess, but doing so would most likely trigger cheat detection.

What do I do?

Can I analyze the game? Should I use a Lichess analysis board? Chessbase?

There are several moments in the game that are really interesting and I want to take a look with engines, but I don't want my account to be flagged because the game is still Open even though it's Over.

Thanks.

Unlimited is actually 21 days. I strongly suggest you do nothing until the game is declared over by Lichess.

Good to know! Thanks.