Iancass

I'm in exactly the same position. For professional work I've moved away from Fujifilm, but for personal work I still love the X-Pro2 form factor. The X-Pro3 indeed misses the point for me. Next to a number of improvements (faster AF, better EVF, placement of the diopter adjustment and exposure comp dial) there are some crucial misses for me: the sub screen is nothing but a gimmick and looks cheap on this camera. The tilting screen is exactly the wrong implementation, whereas the X100V is exactly right if you want a tilting screen at all. Same for the ISO dial. But the main issue for me was dropping the X-Pro2 dual magnification in the OVF rendering the X-Pro3 OVF useless for anything wider than 23mm or longer than 50mm. So I returned the X-Pro3 I had on trial and kept using my X-Pro2 (although I mostly use my M10-R and Q2 nowadays).
Now, the X-Pro models have always been niche cameras for Fujifilm. Therefore the launch of newer models followed roughly a 4 year cycle. So, logic dictates that we should expect a new model around Oct 2023. If at all, because a friendly retailer (one of the larger online ones in Europe) told me that X-Pro3 sales were initially good due to X-Pro2 owners replacing their camera, but dropped sharply thereafter and is now way under previous X-Pro2 levels.
As said before, this is a niche camera in a rapidly shrinking market (digital camera sales dropped between 2011 and 2021 by over 90%) and it's a rather expensive one too. Priced in 'full-frame territory'. Potential buyers love the looks, but buy an X-T3/T4 (of a full-frame compact like the Z5, A7C or S5) because it's more convenient with better options. What doesn't help is that the newer f1.4 lenses (the 18, 23 and 33) are all substantially bigger and render the OVF on the X-Pro's useless, while at the same time some of the crucial compact lenses (the 16/f2.8 and the 23/f2) in terms of pure image quality are not Fuji's best.
Long story short, the X-Pro3 is a rather expensive niche camera with the relative low sales numbers to match that. If at all, the successor isn't likely to be expected before end 2023.