4 day split recommendations

Hi everyone,

Looking for a 4 day split with 2x frequency for upper body muscles, focusing on growing my chest and arms

I’ve tried doing upper/lower splits but i really don’t enjoy training upper all in one session.

My favourite split is ppl shoulders arms but this means only my shoulders and arms are getting 2x frequency.

Thinking to run PPL Upper or a chest/back, shoulders/arms, legs, upper split and just putting my arms at the start of my push and pull days and firming one upper session a week.

Open to any other suggestions