Since you were born in 1961, the ssa.tools calculator isn't showing any COLA adjustments. The PIA increase is based on the 2020 AWI increase of 1.0889195 (or about 8.9%) applied to 2020 and earlier SS earnings. The numbers seem to be the same in your specific case, but mine is about 8.8% more. It depends on your earnings over the years.
If you put in the same info and made your birth year 1960, it should give you the lower amount for your PIA and state that your PIA will be increased by 8.7% at the end of 2022 (the COLA).
Slight correction since there seems to be a lot of discussion on this topic. The 1.0889... increase is the 2021 AWI increase.