New Seller Account (48h old) – Stuck in "Registration Pending" for UK Marketplace

Hello Amazon Seller Community,

I need help with my new seller account (opened 48 hours ago). Here’s my situation:

Automatic Marketplace Assignment: After signing up, my account was automatically set to sell in the US, Mexico, and Canada. However, I need to switch to the UK (United Kingdom) marketplace because:

My business is registered in the UK.

My bank account is UK-based (targeting European markets).

Issue: When I tried to change my marketplace to the UK via settings, I see a "Registration Pending" status.

Is this normal? Should I just wait, or do I need to take action?

If intervention is required, what steps should I follow?

Urgency: I have inventory ready to ship and need to start selling ASAP.

Questions:

How long does "Registration Pending" typically take for the UK?

Are there additional verification steps I might have missed?

Should I contact Seller Support directly? If so, how?

Thanks in advance for your guidance!