Customizing sleep watch face? Instinct 3 solar

Second day with my new Garmin Instinct 3 45 mm solar and still figuring things out, so this may be a dumb question.

I have tried searching and Googling but have not found an answer yet.

My eyes are old, and the default sleep watch face has a time font that is too small for me to see in the middle of the night when I don't have glasses handy.

I can't see any way to change or customize that face - can someone help? Ideally would like a face with just time in a big font - not same as daytime face.