GitHub page for this project?

There is no public repository. But I can assure You that there is nothing interesting in my plugin, it is a modest set of blocks that work within the framework of the allowed blocks (Blocks API). It does not collect any data and does not transmit anywhere.
If you have a specific question or suspicion of any implementation, I am ready to tell in more detail.

It feels like your lightbox is based on Photoswipe.js…is that true?

I’ve been recently burned by malware and so I’m trying to be extra cautious here. This is open source software, so you really should have the source published.

Has nothing to do with Photoswipe.js.

I understand your feelings and fears, but in principle, the code remains open (but it’s bad to read it).
I fulfill all my responsibilities to the WordPress, and I owe nothing to others. ??

It would be great if the code could be published on GitHub/GitLab/etc. I’m trying to customize the plugin a little to fit my personal needs and it would be nice to read the code without it being minimized in order to understand it better.