As listed on our pricing page and camera support article on our Help Center, Rawsie supports a7R IV and a7R III Sony models, but not the a7R IV A (ILCE-7RM4A) and a7R III A (ILCE-7RM3A).
When not sure if you are using an older model or a newer A submodel of one of these cameras, you can always check the metadata on any raw file in question. To check the specific camera model:
Locate a raw file,
Right-click on the file,
Select "Get info",
Scroll down to section "More info:" (open it if it's collapsed) and see "Device model" line. Submodels will have an "A" at the end of the device name.
Supporting ILCE-7RM4A and ILCE-7RM3A) is on our roadmap, please don't forget to register your interest by upvoting these models on our camera support survey.