CLR/RFR reports, when available to one’s SoA (“Selling on Amazon” aka 3P Seller aka Seller Central) Account, appear as a selection - titled “Category Listing Report” - in the drop-down menu invoked by clicking the “Select Report Type” ‘button’ web-page element on the Inventory Reports (link, Seller Central, default simplified URL) Dashboard.
Some time ago, shortly after the renaming of CLRs to RFRs (which was prompted by an extension of their functionality designed to facilitate editing & uploading of a single file, rather than having to first download other reports to find crucial Valid Value data), Amazon launched a pilot program whereby select SoA Accounts were waived of the requirement to first request the enabling of CLRs as a selection type on the Inventory Reports Dashboard.
That program is still in beta, but it remains active for us and other members of our Seller Community today, so it’s best to first check for the presence of that file type in the aforementioned drop-down selection menu.
If it is not available, the seller must resort to the prior method, of opening a Seller Support case specifically requesting that their Category Listing Reports be “enabled” for download from the Inventory Reports Dashboard.
We ourselves for many years have downloaded our CLRs @ least once very biz quarter, and prior to the launch of the aforementioned beta program, I would typically have our Logistics folk use this template to request their enabling for download:
In our experience, an affirmative response was quickly forthcoming (never had to wait as much as 24 hours for a reply to appear, and it usually arrived in a few or hours or less), and the enabling would persist for some time - years ago, for about a month, but after 2019 or so, for about a week.