Your procedure doesn’t work: To check whether location history is enabled, head to the Activity History page on Google’s website and sign in with the same Google account you use on your phone. You can click the arrow next to “Devices on this account” to see which devices you own are reporting location history information to Google.
There is no Activity History Page. It is actually Activity Controls. And there is no “Devices on this account” . If I click on Manage Activity, it takes me to a More Information page and then back to the same Activity Controls without giving any way to manage anything.