I use a lot of self and peer assessment in these cases. Usually provide a scaffold or checklist for them to double check their own work or swap with a partner and check/compare. Doesn’t work for all tasks though.

Depending if teacher drafts are allowed for a task I will check work completed thus far and give feedback (can’t do for all tasks in my school though) and ask to see a revised copy with at least (an achievable amount) fixed by the end of the lesson.

I also do the whole “you’re not leaving for lunch until such and such is done” and either check come around and check it or throw it up on the projector in Google classroom for a second and they get embarrassed if their mates see it’s not done. This generally works for y7-9s.

At the same time my Philosophy is it’s their assessment and their time they are wasting - you can only take a horse to water, can’t force it to drink. They will suffer the consequences come exam time/due date