So I want to know if there's anything left to explore, spoilers, but if I've missed anything please don't give anything away

Playing on a PC through steam and it seems like I have no autopilot or "rumors" tab.

My Ship Log is filled out completely, that is I don't have any question marks or text saying there's more to explore.

I've done and read everything that leads you to the Ash Twin Project and I feel like i know everything I need to put it into context and guess at things I've possibly missed - but since the ship log is done and Solanum wouldn't accept a Timber Hearth Projection Stone I feel like the developers might not have planned for my ideas.

I've got eaten by an anglerfish while trying to bring the advanced warp core to the Vessel (so gotten a death ending), brought the core to the Vessel and warped to the Eye next to get that ending. People talking about the ending don't really give anything away (which I really like) but it leaves me wondering if I can power the Vessel to signal the other Nomai or if I can warp to their safe solar system. If I can, I'd like to know that I can so I can figure it out. Right now I have no idea how I would do it but I could probably figure something out if it's possible.

I have a bunch of hidden achievements left on steam. Are they rewarding to find or in line with landing the model ship on the Attlerock?