Are the frame fit specs for the SRAM RED eTap AXS 36T Max rear derailleur different than the existing SRAM RED eTap AXS derailleur? Where can I find the frame fit specs?

The frame fit specification for the SRAM RED eTap AXS 36T compatible rear derailleur is the same as the current 33T Max compatible SRAM RED eTap AXS rear derailleur. You can find all AXS frame fit specifications and installation guides at the product service page here.