I've added a mirror of the spreadsheet to CryptPad:
https://cryptpad.fr/sheet/#/2/sheet/view/eSplm+1JhNSpZ2vhLc8J08tS0p2nWrp0CiVXVjIQEnE/embed/Getting this to work was a bit annoying (cryptpad broke trying to import the CM sheet quite a few times, likely because it's a pretty big spreadsheet) so please let me know if this is something you benefit from/would like to see continue going forward

Also - if you have issues with it, please let me know as well.
Like I've said you you in PM's, I'm really happy to know that you even considered using this service considering the overall positive response that my previous comment[1] about this generated. If anyone is curious about what CryptoPad is, my reply has a resume about the software.
The good thing about ChipMixer signature campaign eventually switching to CryptoPad (if it happens) is, from my perspective, something that could motivate other campaigns into doing the same - dropping Google Sheets and venturing into a more private friendly service. I honestly don't see anything bad in this aspect - assuming the spreadsheet is correctly imported into CryptoPad - as it would shield both users and campaign managers that every week access the Google Sheets and who knows what kind of information is Google secretly relaying to their servers ...
I do know that there's an application from Microsoft called "Spreadsheet Compare"[2] that allows users to check differences between files, but I would like to find a FOSS alternative (or even some code). I'm most certain that the spreadsheet should have been correctly imported by CryptoPad, but one can never be 100% certain without testing out for themselves.
[1]
https://bitcointalk.org/index.php?topic=1935179.msg61360375#msg61360375[2]
https://support.microsoft.com/en-us/office/overview-of-spreadsheet-compare-13fafa61-62aa-451b-8674-242ce5f2c986