https://www.maxar.com/open-data
https://www.capellaspace.com/gallery/
You need to apply for a key here: https://developers.planet.com/open/
AWS Hosts Earth Observation data here:
https://registry.opendata.aws/?search=tags:gis,earth%20obser...
Also, Microsofts Plantary Computer has a bunch of open data as well.