Any recommendations for a prison theme bl

Haga-kun wa Kamaretai (Yaoi)
Inu wa Kogarete Hizamazuku

If you haven’t read them, these are also from from mangaka of Deadlock:
https://www.mangago.me/read-manga/takaga_koidaro/
https://www.mangago.me/read-manga/aiso_tsukashi/

Also, try these:
https://www.mangago.me/read-manga/criminal_interview/ Starts off in a prison, lots of suspense.

https://www.mangago.me/read-manga/under_grand_hotel/ The most famous prison BL series and has many spinoff and extras too.

https://www.mangago.me/read-manga/prison_love/ Not a BL, but a bender bender hetero, quite interesting.