Interesting line, pensodasolo. I analyzed your spot in GTO Wizard:
Flop: The solver is rangebetting mostly small here; I like your minbet.
Turn: It starts to polarize on the turn, betting with top pair+ for value. Now the solver doesn't open A4o in these solutions, but we can use A5o as a proxy.
River: Your river bet sizing is good for your range. Blocking the 4h is actually quite relevant here as most of BB's flushes contain a 4/5/6h.