New mod Tag Stacker provides a simple way to convert between tagged items from multiple mods. Out for 1.20, 1.21, and 26.1.

Modpack makers can configure which tags are allowed to stack, default list includes ingots, nuggets, storage blocks, gems, and dusts. Can download the mod on CurseForge and find more links on our website. Will be on Modrinth in 3-5 Business Weeks (as their approval process typically goes).