No doorbell planned in the new building

seems to be only a temporary solution until the canopy is there??
The wireless doorbell wouldn't be a problem then.
As a permanent solution, wireless would not be a solution for me.

Do I understand correctly that you have, among other things, a cable for a doorbell button lying there which later disappears into the porch roof?

If that is the case, then lay this in a narrow cable duct to the place where you want to set the doorbell button now.

I consider the wireless doorbell to be okay.

I consider a radio doorbell to be okay.

But that is your personal opinion, which the electrician does not have to assume.

I consider it okay, that was not an intrusive but an individually formulated remark

A wireless doorbell would not be a problem at first. However, the "replacement," that is, doorbell + chime with batteries, is supposed to be used. After all, you don’t want to be reminded to change the batteries in the chime or doorbell in a new building, do you?