1 nap transition tips?

Caitlyn • 👶🏻 🎀 12/17/19 👼 12/18/20 👶🏻 due 10/18

We are just transitioning to 1 nap. It's been about 4-5 days and the longest she has slept is 1 hour 40 mins .Typically she takes 2-2 hour naps. Any tips as to how to lengthen her nap time? This is our day

7am awake

12:30-2ish nap

Bed at 6:45