I could, but it is not likely to happen, and here is why. I have an extremely limited amount of shop time each day. When you take out time for packaging, shipping, maintaining equipment emails, ordering supplies, dealing with all manner of issues, the actual production time is fairly small.
The number of offerings has to be kept limited. As an example I only offer 1 or 2 varieties of very popular offerings of cartridges like the .44 magnum. It takes too long to swap machines over. downtime is money lost.
When it comes to something like a .32 Long, yes I could make it, but for every customer with a .32 long revolver, there are probably literally 100X as many customers (or more) with .380 autos, so it makes much more sense to produce .380 ammo if I had the time to introduce another product. In fact some of the stats I have seen show .380 production over 3/4 million guns per year in the since (if I recall correctly) around 2016-17 and on.
Right now I am focusing on getting production volume up so I can have what I currently offer actually available. I need to make sure that things are in stock when people go to the website!
As cool as it would be to offer all manner of cartridges, its just not possible.