How can I make a datapack apply before all other datapacks?

I am working on a modpack, using both contenttweaker and custom datapacks. The problem I have been running into is that the datapacks created by contenttweaker apply immediately after the vanilla data does, and in order for the mod to see my datapack, the datapack pertaining to it must apply first. So I have a datapack that should be providing loot tables for the blocks I add with contenttweaker, but when it loads, it cannot see them. I have tried using /datapack. Unfortunately, since all these datapacks are applied automatically to the game (since they are part of a modpack), /datapack does not work as the game reloads and the datapacks are reapplied automatically. If anyone knows how to solve this I will be very grateful, I can't seem to figure anything out.