I know of a few retirees who get retirement visas with 200k in the bank.
They were grandfathered in.
So, if you received your retirement visa with 800k in the bank, it will remain 800k.
There has to be a "under consideration" stamp in your passport. The waiting period is usually 1 month. Expect the home visit. Also, neighbors will be interviewed. After your approval, expect another home visit.