Is Pmax or Peak Power actually trainable?

Training
16

I added exactly 130 watts from last season until now at pmax, which is an improvement of like 10% so definitely trainable. That said, I’m still at like under 1200 though, so query how useful that extra power will be. It’s funny though, i dont think that i’m necessarily “weak”, like back when gyms were open i had a decent deadlift for a lanky dude. But I suppose i am NOT explosive to say the least.