(I started writing the below then realised it wasn’t really related to what you were asking but I might as well post it now anyway

).
I plateaued long long a go and have kinda just accepted it unfortunately and apart from doing a stint on the steroids I’m not going to get much bigger.
That’s really great your weights are still going up and I still can achieve by that by going on a “bulk phase” for 3 months and tie this in with really wanting to increase numbers on at least one compound exercise. So 2 years a go it was bench press and this year it was shoulder press and I did see results! I find when doing this I really like to change the specific workout too so I went from a 4 x 10 reps bench press to 5 x 5 reps bench which essentially reset all my numbers so could see positive affirmations very quickly.
Brand new routines help me too, introducing drop sets, adding more volume into a week so can do push pull legs push pull legs (ignore trying to fit this into a calendar week) with switching up of exercises for the second round. A new routine helps me similar to above because your numbers essentially reset. Doing a shoulder press at the beginning of a workout means you can lift more on that exercise rather than it coming midway and you’re already fatigued.
Can also focus on a particular muscle group - I blew my arms up doing a day just dedicated to the tricep and a day dedicated to the bicep and enjoyed that for 6 months or so.
Think what I’m trying to say there’s no dark art to this that AI can help with. What you’re already achieving sounds really great and you
are doing it right.
I found this Reddit post really encouraging for me in confirming I was never doing anything wrong and it can actually be a quite simple affair.
I’m pretty much doing this at the minute but as PUSH PULL PUSH PULL and I like it. It takes around an hour to do but I get volume from doing it twice a week with variations on each exercise.
I have a few spreadsheets of different routines over the years I can share if that helps.