Bro you just fundamentally don't understand what makes a mortgage haram. In a traditional mortgage, the bank typically loans you 80% of the price of the house you're buying. They then charge you interest on that loan. The bank does not co-own the house with you, nor are they listed on the title, they simply use the house as collateral for the loan.
With a halal mortgage, the mortgage company actually purchases the house with you. You put down your 20%, and they pay the remaining 80%. The mortgage company is a co-owner of the house and is listed on the title. Your payments are similar to a traditional mortgage, one portion goes toward building equity (buying out their share), and another portion is considered rent, since you're exclusively occupying the property they co-own with you. This rent is roughly equivalent to what they would have earned through interest.
The way a halal mortgage works is structurally different from a traditional one. It avoids riba because there is no loan. Instead, the mortgage provider actually purchases a share of the property with you. Avoiding riba doesn't have to mean that you stay ignorant of the options you have and cursing your family and their descendants into becoming permanent members of the renter class.
If you want further details, here is the company we bought our house with. Look through their website:
https://www.guidanceresidential.com/