Can a B365 motherboard support an Intel Pentium G4560 with DDR4-3200 RAM?
Your new motherboard supports the Intel Pentium G4560.
The 9100 isn't overly costly and might still be worthwhile. Additionally, the RAM won't operate at maximum speed but will function adequately.
Consult the motherboard's guide. Online searches suggest the Kaby Lake Pentium may not function on a Coffee Lake platform.