Hello,
@CarolinaSanchez you check the value of date field from form, if its blank then provide null value for date field in Create Item. You can use expression like below, just replace outputs('Compose') with your date field of form
if(empty(outputs('Compose')),null,outputs('Compose'))
Michael E. Gernaey
497
Super User 2025 Season 2
David_MA
436
Super User 2025 Season 2
Riyaz_riz11
244
Super User 2025 Season 2