First, if it were me, I wouldn’t rename the images. According to John Mueller of Google:
So having descriptive filenames is good.
But I don’t think you would see a significant change if you already do the other things around images, like the alt texts, the text surrounding the image.
Those are really, really strong signals.
And the filename itself is often… it’s kind of from a technical point of view.
This is what we called it, but it doesn’t provide any real unique information, usually.
Of course, if you don’t do the alt text, or if you don’t have good surrounding text, then, of course, the filename might be the only place where you mention what this image is about.
But if you do the rest, then usually the filenames are okay.
https://www.searchenginejournal.com/google-on-image-filenames-a-surprising-seo-mistake/468366/
https://webaheadinternetltd.co.uk/do-image-filenames-have-a-significant-impact-on-seo/
https://search-off-the-record.libsyn.com/lets-talk-image-seo
Second, if I have time I might look at your stuff, but only if you provide access to a repository. I am not going to recreate your setup.