A. There are several advantages of getting a mortgage even in your retirement, for example, maintain liquidity of your assets instead of putting lots of money in a house.
However, for mortgage lenders, the way they evaluate a mortgage application is your ability to repay them. So if you are in retirement and your income from investments is not large enough, you will not be able to obtain a mortgage. Because of this reason, it's important to try to get a mortgage before your retirement.