ProForm Date option with delay days in pickup date

Hello
Please help with the Date option in ProForm – it’s about selecting the date when the ordered cake can be picked up.
Of course, a certain number of days is required to prepare the cake, and each bakery has a different preparation time. This is a meta field within the CPT.

I want the date picker for the pickup date to take into account the variable that defines the number of preparation days set for each bakery.
In other words, I don’t want users to be able to select a pickup date starting from today, but rather from today + the preparation time variable.
For example, if today is Monday and the preparation time is 3 days, the earliest available pickup date in date picker should be Thursday.

Any idea would be appreciated, thanks!