Depends on what you mean by miscellaneous.
Are we talking about things my team calls "chores"? Things like upgrade some dependencies, or fix something annoying about the DX or build, look into that new library the team's been talking about maybe using to replace some jank part of the app?
If so, we have an epic we simply name "chores". We stack the backlog of chores based on priority and we attempt to get at least one done a sprint.
It's not critical stuff. It's not blocking anything (yet). It's just housekeeping and maintenance stuff that doesn't fit into regularly planned and scheduled deliverables.
Whenever someone says something like "man, our version of Node is super old. We should really look into getting onto at least the current LTS". That's when you say "Add it to the chores!" so you all don't forget about it.