This is my experience only - yours may(likely) differ but since it’s been discussed, I will share:)
The check in area was mobbed. We had been unable to check in online last night despite many many tries. We had Priority check-in so we got to skip the line -guesstimate how long it would have taken… at least 45 minutes.
Portugal requires a test for US citizens in general.
We had our Passenger Locator Form for Portugal, our US CDC cards, and our antigen test that was 16 hours old.
The agent asked for our Locator forms. She took the entire printout and checked that the name matched our passports. Then she looked at our CDC cards to make sure that there was a booster notation.
She did not ask for our COVID tests.
In addition, last night Air France, who is flying our CDG to LIS leg, sent me an email, asking if I wanted to get “FlyReady” for that leg. I went ahead and uploaded our COVID tests, Passenger Locator Form and CDC card. I got an email back with FlyReady clearance for the second leg of our flight. I’ll report back if it’s anything helpful in the Paris airport.
Note: to upload to the AirFrance site, I had to take the pictures of the documents, save them as smaller PDFs and then load them. In their normal right-from-the-camera size, they were too big and Air France rejected them. You can also save them to a scanner like Adobe and then load them from there onto the Air France site as that shrunk them too.