First, no. These are what the SR's are supposed to be in the first place, it's just that back in 2021 the old client wasn't able to do the new calculations, hence the split.
Second, whether or not you play with Relax (I presume that's what RX means because I can't think of what else that abbreviation would mean) has no bearing on whether or not the map itself is ranked. You probably can't submit scores using RX since it's an auto-hit bot and you only aim, but that has no relation to a map's SR, AR, OD, etc.
Third, the "names" ([Easy], [Normal], [Hard], [Insane], etc.) haven't changed what they represent. Beginner/easy is 0-~1.99*, Normal is 2-2.99*, Hard is 3-3.99*, etc.
Fourth, were you not aware that the client was listing both SR's (client-side as local SR and web-side as the "normal") simultaneously until this recent update?