Can't find information about this node here: https://docs.nextcloud.com/server/latest/developer_manual/app_development/info.html
Can you give me more context ? :)

Sure, the types are used to load groups of certain apps earlier than others.

E.g. authentication apps should be available as early as possible:
https://github.com/nextcloud/server/blob/b78f3a57d1d05fb5f81ec8361139b64a3e54d7b0/lib/base.php#L979

filesystem apps are loaded before all others with https://github.com/nextcloud/server/blob/b78f3a57d1d05fb5f81ec8361139b64a3e54d7b0/lib/base.php#L997 so their application bootstrap is ran early as well.

There was no concrete error case in the Collabora integration but you might want to have a look at the description in ONLYOFFICE/onlyoffice-nextcloud#511 (comment) for a bug caused by the too early loading in combination with the guests app ONLYOFFICE/onlyoffice-nextcloud#511 (comment)