If you know roughly where it is you should find it emerging already. I don't think you will harm it by moving it a bit late, so long as you give the crowns a year to re-establish before pulling. Rhubarb is tough old stuff.
And when you've moved it make sure you remember where it is
Cred air o bob deg a glywi, a thi a gei rywfaint bach o wir (hen ddihareb Gymraeg) Believe one tenth of what you hear, and you will get some little truth (old Welsh proverb)
We moved ours a couple of weeks back coz it just HATED where it had been for the last 3 years, and it's popping it's little buds up already! Must love the new spot!