I do that regularly. Not really when it is less then ideal, I don't think less then ideal necessary constitutes technical debt. But when it was hard to read and I just had to read it, when it was hard to modify and I had to modify it. Or when I was modifying something nearby and this was for free. We also have occasional actions like "remove this particular code smell from everywhere where you find it" and explicit "refactor that part" issues that are routinely assigned as part of sprints.

Obviously, we do weight how much time it takes to fix it vs how much of the debt it actually is. We would not had that much independence in these decisions if we did not.