###No, because you don't have spell slots for cantrips

The wording of the feature already shows why you can't exchange a cantrip:

which also must be of a level for which you have spell slots.

You don't have spell slots for Level 0 spells, which a cantrip is (PHB p.203).

No, because you don't have spell slots for cantrips

The wording of the feature already shows why you can't exchange a cantrip:

which also must be of a level for which you have spell slots.

You don't have spell slots for Level 0 spells, which a cantrip is (PHB p.203).