I know of planet Yuma, but I think the lore behind it was completely changed so it could fit Colonial Republic development
It went from "bidding war between OS&C and synthfoods to colonize" to "DSE was kicked out of the system by pirates, and then CR found it and Libeerty had absolutely no problem with that", and so the colonization of Yuma was forgotten.
There are several low gravity planets scattered around Omicron and Sigma space that could support dome colonies, if you can convince the parties that hold interests in the systems to let you colonize.