Enleum is a small company and the rave reviews for the 23R have created greater demand than they can supply given the supply chain issues.
Many small high end audio companies have the same issue. Last year I inquired about a Decware amp and I was told the waiting list was about 1 year. I waited 10 weeks for ZMF Verite Open headphone shortly after it launched and that was before the pandemic. Decware, ZMF, Enleum and a bunch of other small companies that have products in high demand are facing the same issues of part availability and work force issues.
I bought my Enleum 23R in December before most of the reviews were published. At the time I bought it, there was only the 6 Moons review. I ordered it on a Monday in December from Jaguar Audio and received it the very next day.
I believe that because of supply chain issues/availability of parts, design changes were made to the 23R. I know the remote control, speaker binding posts and I’m sure other internal parts were changed around the time frame of the OP’s order. Making design changes on the fly is never an easy task. The design changes need to go through design verification testing to insure that the changes will provide equal or better customer satisfaction to the older design.
Of course you can cancel your order but you’ll be missing out on a truly excellent amp. In my system, the 23R has been a game changer. I understand your frustration, but I think that since you’ve waited this long, you might as well wait just wait it out. However, I agree that you should be given an estimate of delivery timing.