I would like to do a backport of [GEOS-10696] Allow configuration of Output Format types allowed in GetFeature ( https://github.com/geoserver/geoserver/pull/6230 ) to 2.21. Note that I plan on waiting until 2.22.0 has got from RC to final release beforehand.
All of the settings for this feature default to off (in this case GetFeature Output Type checking) and will result in no impact to previous installations.
Thanks,
Joe Miller