PMC should have Minecraft bedrock behavior pack, and Skin Pack support (aka mods)
Currently if you want to add a behavior pack for BE you have to add it as a java edition mod or a bedrock edition texture pack, neither of which people would be looking for BE behavior packs, the reason I don't use a bedrock only site like mcpedl is because it lacks the features and safety of pmc, as well as pmc has a bigger community.
There are 3+ ways to fix this

1. Under mods or data packs for java add an option for BE behavior packs or
2. Add a whole new category for behavior packs for BE, or use the same page for BE texture packs and add a behavior pack option because they use the same file type

Edit:
There should also be an option in the new behavior pack section (and also in generic BE PACKS) to add an .MCADDON file in addition to the .MCPACK File


Explanation:

The .MCPACK extension contains one pack, a Behavior, Texture/Resource, or Skin Pack.
The .MCADDON extension contains multiple .MCPACK files