How to check Performance of Dynamics 365 FO

To validate issues on the UAT/ Sandbox Environments Go to the URL and append below

D365URL &Debug=develop 

Performance timer - Finance & Operations | Dynamics 365 | Microsoft Learn

then open long-running forms or report and perform some operations if it's taking the time you can see right side time is counting on the process once it's done you can able to evaluate which query consumed more time.