An alternative to one big queue is a separate queue for each client (external customers, internal teams, the dev team's own tech debt, etc). Each client manages their queue order themselves; the dev team just needs to focus on the head of each queue (and working with clients to clarify the requirements for the next few tasks in the queues).

"JIT selection from independent streams: An alternative to the “big backlog” of work"

https://longform.asmartbear.com/jit-backlogs/