Hi Aksel, I have three recommendations.

The tent I own is the MSR Hubba NX 1. I have had it since 2018 and it’s still in perfect condition. Nothing has broken or is damaged. It’s easy to put up with plenty of space for one person. It’s also great in windy conditions (stable) and very very waterproof. The downside is the poles are long and not that easy to attach to a bike. I usually have them in my rear saddle bag or attached to my handlebars. https://bikeshop.no/msr/06203/msr-hubba-nx-telt-grønn-1-person-1120-gram?gclid=Cj0KCQjwsIejBhDOARIsANYqkD380FcxCK-FXsXEPOdqqGb0foT4OSiOR1ChtKKlIM7YCPn_FfmUKScaApw_EALw_wcB

Big Agnes designs tents specially for bikepacking with clever storage compartments for helmets and bags. The biggest plus is the small tent poles that are easy to store on the bike. The downside is the price. They are very expensive but expect high quality. https://www.fjellsport.no/merker/big-agnes

Lastly, you have the Australian brand Sea to Summit: I don’t own one of their tents but have other gear from them, and am always impressed with the quality and innovation of their products. https://www.vpg.no/sea-to-summit/319671/sea-to-summit-alto-tr1-plus-ul

The bottom line – all these brands will offer high-quality tents. If something brakes they will usually replace the broken item for free (MSR certainly does that).
4000- 5000 NOK is a lot of money to spend on a tent. But if you use it every summer for 10 years it turns into a bargain. I plan to use my MSR for at least another 5 years – probably longer. That works out at 400kr a summer!