Sounds like the pump in the transmission failed. We need to start with checking the fluid and make sure it is full and not burned. If it is then we need to replace the fluid and top it off.
If the pump has no fluid to pressurize then it will not engage any gears and the RPM will just rev up.
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Below you will find the info on the pump which is what I suspect this is.
If the fluid is ok then we need to check for codes and then check the pressure in the unit. However, that is not the easiest process so let's start with checking this material and go from there.
Thanks
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Friday, June 25th, 2021 AT 6:58 PM