Django SQL syntax error when using two different database engines - django

Question

I'm trying to use django with multiple databases. One default postgres-db and another mysql-db. I followed the documentation on how to configure both dbs:
https://docs.djangoproject.com/en/4.0/topics/db/multi-db/
My settings.py looks like this:
DATABASES = {
"default": {
"ENGINE": "django.db.backends.postgresql",
"NAME": "default",
"USER": "----------",
"PASSWORD": "-----------",
"HOST": "localhost",
"PORT": "5432",
},
"data": {
"ENGINE": "django.db.backends.mysql",
"NAME": "data",
"USER": "---------",
"PASSWORD": "---------",
"HOST": "localhost",
"PORT": "3306",
}
}
Things work fine when querying the default database. But it seems that django uses postgres-db sql syntax for queries on the mysql-db:
# Model "Test" lives in the mysql-db.
Test.objects.using('data').all()
# gives me the following exception
psycopg2.errors.SyntaxError: ERROR: SyntaxError at ».«
LINE 1: EXPLAIN SELECT `test`.`id`, `test`.`title`, ...
It even uses the postgres-db client psycopg2 to generate/execute it.
Using a raw query works fine though, this means it does correctly use the mysql-db for the specific query.
Test.objects.using('data').raw('SELECT * FROM test')
# works
How can i configure Django to use the correct SQL syntax when using multiple databases of different engines?
Thanks!