Paginated reports: Parameters: Support Relative Parameter Default for Dates

The web based low-code paginated report editor is great. I've added a parameter to a report, but it doesn't support a relative date parameter, and I need to create a paginated report for a data model that emails the previous months' results to a staff member.

I believe the I need to download the report and edit it in Power BI Report Builder as a workaround for a "within the last month" parameter value not being possible in the low code editor.