Kinda thinking out loud here based on my current research. If you wanted to drive to Swizerland…
France wants negative test taken in last 24 hours (so has to be Rapid Antigen / Flow).
Switzerland wants negative test – PCR in last 72, Flow in last 24. I usually stop on way down / across so have to get test day before so Flow / Antigen won’t be within 24 hours which means PCR 48 hours before leaving, antigen within 24 hours of leaving.
Location forms for Switzerland. Waiting to see what other documents for France…