items = Item.objects.values_list('id', flat=True).filter()

[UUID('00c8aa9e-2f61-4bac-320c-ab26b8fb1de9')]

['00c8aa9e-2f61-4bac-320c-ab26b8fb1de9']

print(str(items))

items = [str(o) for o in items]

from django.db.models import TextField
from django.db.models.functions import Cast


items = Item.objects.annotate(str_id=Cast('id', output_field=TextField())).values_list('str_id', flat=True)