BTW,
@Sandy1, you don't know this because you don't travel to Spain and may make wrong assumptions but the fact is that everybody who travels from the USA to Spain today and in the next few days, had to register with the Spanish health authorities in order to get a QR code. Without that QR code, no flight to Spain and no Camino for them. They have made a pledge in order to obtain their QR code and they are reminded of their pledge when they receive their confirmation email (quote below - this is current as of today 18 April 2022).
Am I naive when I expect that foreign pilgrims in Spain will honour their pledge?
REMEMBER: If you travel to Spain, you hereby agree to carry out all measures and instructions indicated by the health authorities. You also undertake to comply with the hygienic-sanitary measures established by said authorities, which can be found on the website of the Spanish Ministry of Health. If during your stay in Spain you have acute symptoms compatible with COVID-19 (fever, shortness of breath, cough) stay at home or in your accommodation until the fever disappears or the symptoms improve. Wear a surgical mask to interact with others in the 10 days following symptom onset.
[Followed by list of phone numbers of regional health authorities to contact]