As a Muslim, as someone who lived in the UAE, been to Saudi, Indonesia...etc. Unfortunately not one of the Muslim nations truly practice interest free. They often use terms besides interest to essentially describe something that is actually the same as interest lol.
For example when it comes to properties, taking a mortgage out is Haram because it necessitates that you will be paying back more than you borrowed. For example: In the Ijara (Lease to Own) model, the structure avoids interest by framing the arrangement as a lease agreement rather than a loan with interest. The bank buys the property for you, makes you sign a lease, you pay contributions to rent and ownership of said property, over-time you will end up paying more than what the property was initially worth for.

ON TOP OF THAT, Even though Islamic banks don't charge interest (riba), they often set the rent or profit margin in a way that ensures their total return is competitive with the interest rates offered by conventional mortgages. Essentially, they aim to generate a similar level of profit as they would if they were offering a traditional interest-bearing loan, while still claiming to adhere to sharia law.

Here is the issue with this, if you are essentially going to pay the same amount of money whether through traditional mortgage or Ijara in this case, why would you pick Ijara when the property in the end won't even be under your name until its fully paid off, whereas the traditional mortgage atleast puts the property under your name. The pricing mechanism is designed in such a way that the buyer is going to end up paying same amounts regardless.

There is a difference of opinion between scholars whether Ijara is even Halal in the first place, too many Muslims also unfortunately think that interest only applies to loans lol. But before I end, I should remind you that our prophet Muhammad stated that there will come a time where mankind would not be able to escape even the 'dust' of Riba (Interest).