Sony has released new firmware 3.20 for the A7RII and 2.10 for A7SII to enable XAVCS video recording on SDHC (rather than the larger XC) cards. The European updater is, as usual, not on line when the US/Americas Sony site has got it all ready to go. They are the same software so it’s safe to use either.
Though nothing else is mentioned as improved, we note that lens compatibility is an active link in the list of inherited changes.
and for A7SII:
European support for A7RII is here: //www.sony.co.uk/support/en/product/ILCE-7RM2
and for the A7SII: //www.sony.co.uk/support/en/product/ILCE-7SM2