ESA’s PILOT-D navigation demonstration camera was planned to be flown on this mission, but is already being procured from a commercial service provider and will fly along with them on their mission,[27] due to continued international collaboration having been thrown into doubt by the 2022 Russian invasion of Ukraine and related sanctions on Russia.[28][29] The demonstrative instrument was supposed to collect data for the landing of other missions and was therefore not part of the probe’s operating system.[30]
Doesn’t sound like it was a critical part of the mission.