"LITEMATICA" It is a bit involved and takes somewhat of a learning curve to get used to but you can save your build even on someone else's server FYI. You can then restore it on one of your single play saves. From there it was a regular World edit mod that saved it to post on here. A bit of a PITA but it is nice to see people use it. I use world edit mod on my server and single player because it is SO much easier to use IMO. I have a single player save that I use to save all my builds.

I borrowed your design a bit, not near as nice as yours and I will give proper credit to you for my schematic I am posting. I will say I got the idea from you and hopefully PMC lets me link to this.
www.planetminecraft.com/project/storage-room-java-1-19-3/