In Fusion 360, text in a sketch cannot be constrained directly like other geometry, but you can control its position indirectly:
Anchor Point: The text box has a point (bottom-left corner) that can be constrained using coincident, horizontal, or vertical constraints to other geometry.
Dimensions: Use dimensions to control the distance from the text's anchor point to other sketch elements.
Fix/Unfix: Right-click the text and select Fix/Unfix to lock its position in place.
The text itself (font, size, etc.) isn't treated as fully constrainable geometry, so focus on anchoring its location.
unless you were to explode the text of course which would make it into lines that you could constrain fully.
Wishing you a very happy new year
Ricky