Question
Tuple lookups are not supported in SQLSERVER, and this is clearly stated in the docs.
However, Django has a setting supports_tuple_lookups for the Feature class, which can be set to False.
For example, Oracle did not support those until recently, hence https://github.com/django/django/blob/stable/5.2.x/django/db/backends/oracle/features.py#L77

Is there any particular reason the setting is omitted for the SQLSERVER?