Walter, you rock, thank you so much for taking time out to help me on this.

(sorry the discord thing didn't seem to work initially, I did select the supporter option)
c_Joerg, thank you for the links to make the EOScard part easy for me.
I really appreciate this and those bits of script worked a treat and saved me hunting down an innocent mac user for the only other software I know of.
Running it gave me CAM_INFO.XML file
Info excerpt below
-<FirmwareVer>
<Internal>0.3.9.8</Internal>
<Major>1.6.0</Major>
</FirmwareVer>
<ErrorList/>
<TotalShoot>2479</TotalShoot>
<TotalShutter>1086949606</TotalShutter>
<PowerOnCount>404</PowerOnCount>
<TotalRunningTime>205183</TotalRunningTime>
</CameraInfo>
</Canon>
Not sure what totalshoot relates to but total shutter tallies near enough with the image numbers i'm getting recorded at currently 2898.
Perhaps that covers eshutter actuations as i've played with that in image stacking where the total shutter shows actual physical shutter?
Either way i'm happy that it seems to be accurate and hasn't had a count reset after a 90 thousand actuations etc.
For summary for other readers in case this is useful.
EOS RP
Run CHDK on an old 16GB card Formatted to FAT32
Low level formatted in camera (don't know if this matters)
Bootdisk and Script selected
Copied files supplied by Walter using notepad++ and saving as directed.
Card inserted in camera
Press play
Press Q/Info button
LED flash
CAM_INFO.xml created