Multiple Server Resourcepacks for certain Datapacks

So guys im making a server with some datapacks and server-side mods, and i have come across these datapacks which require a resourcepack in order to be properly utilised with all the cosmetics and whatnot, the issue being i cant use more than one server resourcepack, and yes i know about Smithed MC's Weld but im not really sure how to use it so uh thanks in advance.