Shimano and Campagnolo mix

Short answer - no

I stand to be corrected but I think the only cross compatibility is with 11 speed cassettes where the spacing in such that you can run a Shimano 11 speed cassette with a Campagnolo 11 speed shifter and vice versa

Edit:- Just remembered that you can buy a ShiftMate which will allow mixing of components but not sure how efficient they are.

https://www.sjscycles.co.uk/cables/jtek-shiftmate-1/

Link above is to the ShiftMate 1 but I think there are multiple options for different scenarios

If you can find any I believe Sachs New Success shifters are the same as Campagnolo 8 speed but with a pull ratio that matches Shimano. Sachs developed them along with Campagnolo but were then bought out by SRAM so that was their last groupset.