You should get 5 years of updates out of it I suspect. It was originally released in September of 2021. So, 2026 might be the final year of iOS updates you'll get, then it's just a matter of how long they back port any security fixes. Sometimes devices end up getting longer support so it's tough to say for sure.

At this point one of these SE type devices is on my list for any future upgrades. I've gone to carrying a pocketable camera with me pretty much anywhere so having a good camera on my phone is no longer necessary, which means no more Pro model for me.