Similar to Criggie's suggestion of quick-release pedals, you could use one of those temporary flats (plus a toe strap) that clip onto clipless pedals.

On another question, Gary E says he uses a set from Fly Pedals. You could use SPDs underneath for your daughter's eventual transition. (Or tighten them pre-ride to her shoes and let her try clipping in and out without buying bike shoes.)

Similar to Criggie's second suggestion of quick-release pedals, you could use one of those temporary flats (plus a toe strap) that clip onto clipless pedals.

On another question, Gary E says he uses a set from Fly Pedals. You could use SPDs underneath for your daughter's eventual transition. (Or tighten them to her shoes before mounting and let her try clipping in and out without buying bike shoes.)