Hey, welcome! You can try and report this issue to the MSFS support team on the Zendesk site. It looks like ETSI is blurry on the map and that might be why it hasn’t been recognised by the AI and added to the sim. It could also be to do with the military zone. Hopefully the team can look into this and do something about it though.
This is because the Bing aerial view of that airport is blurred. From what I have seen reported here it seems that as soon as an airport is blurred or only partially blurred in the Bing aerial view, it’s not included in the game. Most likely reason is that some country’s military had their hand on it and told MS to blur the airport.
ETSI is my home Airport since many jears in FSX. There is a mod but unfortunately without ILS.
Am I right that MSFS is not willing to solve this problem?