I've had the same Poweramp setup for the past 6 years on my Moto G5, dark skin, pro buttons, shuffle categories so I can skip to a random album.
Now on my Galaxy S23 (base model), on every launch I only see the single big play button, and the skin is always light. I use the skin labeled 'dark, built-in'.
If I go into settings, Pro buttons is toggled on, and dark skin is toggled on. Each time I launch the app, I have to go to settings, look and feel, skin, toggle pro buttons off and on, and that fixes both the pro buttons and dark skin.
The strange thing is, it does remember that I want to shuffle my categories, and my EQ settings.