Ugh it just occurred to me you'd be stuck with Exynos on the S22 in the UK. That would not be great. Samsung Exynos is not as good as Qualcomm.
If you can catch a deal on one of the lower cost S22's to tide you over and trade up to the S23 or s23+ in February, that might be a more satisfying experience for an iPhone enthusiast. The S23 series is strongly rumored to get the new Qualcom chip with better efficiency and much better cpu and gpu performance. There will be some camera upgrades as well.
S23 is a lower maximum resolution than what is available on the S22 Ultra. But I have my S22 Ultra currently set to the FHD resolution instead of max resolution and feel very comfortable on it. And it has noticeably lowered my battery consumption.
I do hate the Samsung keyboard. I'm going to try GBoard on it.