Very good progress! It is impressive how much has been done since 2023, amazing.
I have a couple of comments, might be useful based on my experience (almost 10 years of IT project management/delivery of software):
-It is about time for you to set up your company(if you don't have one already) or selfemploy and put the game officially on Steam/GoG/Epic. You need a legal entity to do this, you surely know this all. You need to trademark the name of the game, the world, etc. It costs a very little but for 4X games market is rather small and audience needs a lot of time to discover hidden gems like this.
-you need to start getting wishlisted on Steam and this is also time consuming
-This might also help you to find a proper publisher. I know that right now you are probably kind of against it, and you are right! But there are still some good people there who won't interfere with development giving the space to focus on important stuff. See Esoteric Ebb development history. Keep in mind that vast majority of publishers would just rip you and don't go with the first one that have reached you. Unless it's hooded horse or raw fury

Localisation, better art and promotional activities are the most valuable areas to help you with. Usually translation to 3-4 extra languages (Chinese and Spanish especially) might boost the sales by 50%, see early announcements by Brad on Elemental:Reforged.
-AI animation - don't overdue this, I can't be as distracting as the lady with a sword gif. However the second gif (warlock?) was really good. There's a vast group of ppl that will absolutely hate you for using any AI art in the game and you should just ignore that and be prepared for a shower of **** from them.
-You should work more on worldmap screens, especially these resource icons with black backgrounds, they does not fit all not and could be considered as repulsive. Do you have a full worldmap (I mean the main game screen, where you control your units, see resources, etc) with full UI? Nevertheless, resource icons needs to be smaller, maybe with a oval shape? I assume that armies would be a 2D static images - just a face of a leader is not good enough. This should be a full sprite, because that's what ppl are used to. Shields of Loyalty did it almost right recently, as for the low/no budget game. They've even managed to animate the sprites, maybe that's the place where AI could help you.
-This might sound subjective, but unless you have all major features implemented you should not focus a lot on details or finetuning things that work right now. I feel you are focusing too much on AI, small improvements to terrain, minor diplomacy efforts while there's no full UI or general presentation of the game. I think your priorities are right, but sometimes you get drifted off by some new cool idea to implement instead of focusing on boring basics. This is very common for one man projects and difficult to overcome.
Out of curiosity - what's the engine and tools you are using to develop this?