iPhone 12 GPS completely inaccurate while inside a house.

iPhone 12 GPS location is so inaccurate when i check on maps while inside any house or shop! On the other hand my brother’s iPhone 7 shows accurate location. Even the compass direction is also so different between the iPhone 12 and 7 ( i guess it’s due to gps only) It works quite good when i am outside the house.

Even a old 25k phone shows accurate location at the same position but iPhone 12 is inaccurate since i have received it.

Am on the latest IOS 14.2.1

Is it happening just to me or to other people too?