Looking to upgrade, clueless about pc stuff

Not a tech savvy guy but I'm looking to upgrade a pc I bought about a month ago, the PC came already assembled and I'd like to upgrade from 16gb ram to 32 gb. The ram the PC came with is a Netac shadow 2 (black edition), I've looked everywhere for exactly the same ram but is OOS in all pages I've checked so I wanted to know what other ram I could get that is compatible with the one I have.

My PC has specs are:

GPU: AMD RX 6600 8GB GDDR6

CPU: AMD Ryzen 5 5500 / 12 Threads

AMD Motherboard: Chipset B450

RAM: 16GB Blindada 3200MHz

Power Source: 550W Reales

SSD: 240GB SATA3