Expo has it's own set of limitations, e.g. I've been using hooks in production since november 2018 and it only arrived in expo may 2019. If you are ok using expo go for it! They seem to be doing great progress.
About next, I don't know what the issue is, try creating the project separately and copy pasting the folder into the monorepo. Otherwise open an issue with them about monorepo support.
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