MacBook air, keys 4rfv does not work

I have a macbook air M2 (bought around september 2022 and have not had many issues since then). However, when i opened it last week (after not having used it for about 2 weeks) the keys 4 r f v and the search symbol, didn't respond.

I restarted it but nothing happened. I tried to update the computer since I hadn't done that in a long time, but it did not work. I have now also done the apple diagnostics but it did not find that anything was wrong.

I don't know if it is of any importance but i can use an external (bluetooth) keyboard without any problems.

What could be the problem and what do I do now?!

How much could it cost to repair?

Help!

Thanks in advance