Both Sony Xperia 10 ii and 10 iii are part of Sony’s AOSP open devices program. SailfishOS is already running on the 10 ii, please get /e/ on them as well, so that consumers can start to have a semblance of OS choices.
/e/OS is built on LIneageOS, so /e/OS on these devices will probably only happen after there are LineageOS builds (official or unofficial) for them