Events start in the WN around here, https://infinitenoveltranslations.net/hachinan-tte-sore-wa-nai-deshou/chapters-41-50/interlude-19-the-depression-of-the-baumeister-familys-eldest-son/
or you can jump to here , note the events in the WN and Manga happen slightly different so you maybe...
This chapters starts right about here, https://syilpharhea.com/2019/05/23/banished-healer-chapter-11/
and ends here https://syilpharhea.com/2019/05/25/banished-healer-chapter-15/
This happens here in the WN
https://lightnovelstranslations.com/i-woke-up-piloting-the-strongest-starship-so-i-became-a-space-mercenary/027-trump-card/
Ending seems rushed, maybe it got axed. The whole story was doing ok, I was not expecting the WN (which is much better) and the art was pretty good, but those last 4 chapters kinda sucked with how fast the forced the story.