Yeah, 7945HX laptops are going to use a dedicated GPU like the 7900M or 4090 because the integrated graphics on there is mostly... vestigial. 2 CU basically means 2 cores (from the last generation) in Apple terms. Rumours are AMD might shove a (laptop) 4070-ish GPU with 40 CU into the next refresh (if I had to guess the numbering, 9950HS) but I don't think they would see a point in going higher than that (if they even try that much), because the higher GPU performance segments are going to be served by their dedicated GPUs paired with the HX CPUs that have 2 CU.
AMD doesn't really have the volume to outbid Apple on the leading nodes, so what they do get is going to keep going to server/HPC. That stuff is more money for them anyway. Adding more cores, both CPU and GPU and shrinking to TSMC's latest node, it isn't easy but it's technically simple enough that they could do it in a few months if they thought there was enough of a market for it. There just isn't, unfortunately.
AMD doesn't really have the volume to outbid Apple on the leading nodes, so what they do get is going to keep going to server/HPC. That stuff is more money for them anyway. Adding more cores, both CPU and GPU and shrinking to TSMC's latest node, it isn't easy but it's technically simple enough that they could do it in a few months if they thought there was enough of a market for it. There just isn't, unfortunately.