Not sure about the other locations, but the Malta restrictions was changed within a couple of hours of being announced and they didn't care about where it was manufactured.
Good for you Bass. I too followed government advice and got AZ early May and was scheduled for second dose in July... but got Covid first in early July. Unlucky of course, but if I were a little younger or a few years older, I and you would have been fully vaccinated in early/ mid June. Have several younger siblings/ cousins/ friends in 40s and 50s, all doubly vaccinated by the time Covid caught me up.
As things stand, will now have to wait to get some Covid cert based on recovery. Can't see any point in a second AZ jab. Likely all recipients of AZ will be lined up again before Christmas for an mRNA vaccine. They'll call it a booster but in reality it's what they should have done in the first place.
The CoViD cert based on recovery is only valid for 180 days. Completing the two vaccine course would give you an open ended certificate.