Tooltips Only Showing the "Auto" Option

In the tooltips section on the filled map, the only option showing in the dropdown is "Auto".

When I tried searching online for what the issue could be, I found out the feature is not supported at the moment.

Kindly provide a workaround for this as I am unable to follow along in this step.

For full context, this is the link that leads to the said response I found online:

https://community.fabric.microsoft.com/t5/Service/Customized-Tooltip-is-not-displaying-in-Dashboard/m-p/774136#M74910