The 27th version of Optimum Realism will soon be released in the coming month in the first week hopefully, and there are many blocks that I've been working on this month. In fact, I'd say that this has had one of the most numbers of blocks that I've added in a release - mainly because Minecraft as well has been giving out many new blocks in 1.21 - and I intend to try to cope with it as well as make existing blocks better, and texture existing untextured blocks as well.
I'll have a detailed changelog soon once I release the update, but it's gonna be much bigger than you anticipate ;)