I have two suggestions for how to better integrate with Thermal Expansion that are small but significant. I'm playing 1.12, but this is equally applicable to 1.16.

1. Allow the use of portable tanks of fluid in the place of buckets of fluid in crafting recipes, like Thermal Expansion does. For example, when I'm making signalum blend I can use a portable tank that holds multiple buckets worth of destabilized redstone to save the trouble of having to refill the bucket between each time crafting or fill multiple buckets prior to crafting. However, in Simply Jetpacks recipes (such as the Reinforced Thruster), I have to use a bucket.
2. Add a recipe to the Arcane Ensorcellator machine for the Fuel Efficiency enchantment. This could be something as simple as a piece (or block) of coal, or something more involved and expensive like a certain tier of thruster.