As of mod version 3.1.1 in Minecraft 1.18.2, it appears that the Loot Fabricator and Simulation Chamber both do not have any correct tool for being mined. This means that a player attempting to break those blocks will do so very slow (5-10 seconds per block) regardless of the tool used, Efficiency level, and (possibly) Haste.

This can be fixed by adding the following in a data pack:

data/minecraft/tags/blocks/mineable/pickaxe.json

{
	"replace": false,
	"values": [
		"hostilenetworks:sim_chamber",
		"hostilenetworks:loot_fabricator"
	]
}

Data pack that should fix this: hostile_networks_mineable_fix.zip
Install instructions: Add the ZIP file directly to the world's data packs folder without unzipping.