josan420
I understood your issue in the 1st post itself, but I am not sure if you understood the solution that I provided.
Here's the detailed explanation:
You do guest checkout and enter correct address, and name and phone number of customer ✅
You place the order on behalf of customer ✅
The customer later wants to use the app by themselves and will have issues in login according to you right?
No they won't have any issues if you Enable OTP login
Because on OTP login, they will just enter their phone number and an OTP will be sent to them, when they enter the OTP the will be loggedin. And the best part is they will also be able to view the past orders that you had placed for them.
On OTP login, the customer are asked for name and email if they are new, if the number is already registered, the OTP is directly sent. (In your case, the phone number will already be registered as you have already placed an order via Call and Order module)
Call and Order module will first create that customer with the name and phone you provided and then place the order.
I hope I am clear now?