Gap between terrace door and masonry

Hello everyone,
maybe someone has a tip for me or can confirm that everything is okay. I am an absolute layman, so I just want to be sure here.
New terrace doors (lift-and-slide door and regular sliding door) were installed for me. Now the gap between the wall and masonry seems a bit large to me. According to the window manufacturer, I now also have to accept additional costs for the profiles (cover). In addition, there is the problem of finding a cover that has the same color and grain, I am still curious about the delivery.

Another issue is the seal to the outside, liquid plastic is required here, additional costs over 500€. According to my electrician, this would be very unusual because the stuff is extremely expensive, he wouldn't know it like that...

Is all this correct or do I need to seek a conversation here? Attached are two pictures with the measurements to better understand the question.

Thanks in advance

Isn't there going to be a roller blind or something similar there? What does it look like from the inside?

Is anything agreed upon in the contract regarding the new windows? Who, what, and at what price?

I would have expected the jamb (and thus the gap) to be additionally insulated.

Isn't the door then too small? What does it look like behind the Kompri tape?

Questions and more questions.

Thank you for your questions and answers, I would like to respond to them with pictures, I hope this will help you understand better. Outside, blinds are installed.

500 for the sealing at the bottom is not too much.

Usually, it is also stated in the offer that the sealing at the bottom is provided by the client.