Applied Mekanistics is the official Mekanism support addon for AE2, requiring both mods. It adds chemical support to AE2 devices and 1k, 4k, 16k and 64k chemical storage cells, which cannot store radioactive gases.
Within the Minecraft 1.18.1 - 1.21.1 range, support starts at 1.18.2 with Forge; 1.21.1 requires NeoForge.
Rent your own Minecraft server and install the addon with one click from the panel to bring Mekanism chemicals into your ME network.