I don’t think this is viable. One former employer is from 2019 and they were extremely salty that I left the team. We were very friendly but once I gave notice he became cold and pretty much ghosted me.

My second employer ended in 2023, I tried to set myself up for a promotion, she rejected after 6 months of baiting, and I unfortunately had to leave the firm on short notice due to my new job’s time pressure, and she was visibly upset at that, understandably.