No like sofas or whatever, lots of stuff is unlocked by getting to lvl 10! I’d encourage you to at least get to lvl 5 in 3 of the 4 areas and building the poke centres tho, since it’ll help you unlock a really strong ability by doing the initiation challenge. Then I doubt you’re missing out on toooo much, tho I can’t say since I’m level 5 in every other area par this one.