The code email never arrived
Look in spam and in the promotions tab. If it is not there, close the sign-up dialog and start again: that issues a fresh code. Old codes stop working.
All you need is an email. Polymarket creates the wallet for you behind the scenes, no extension to install and no recovery phrase to write down.
Polymarket is the prediction market exchange where your bets actually live. Layback X is the interface you will trade through, but the account and the money always sit on Polymarket's side, in your name.
If you have used crypto before, you might expect a wallet, an extension and a 12-word phrase. None of that here: you sign up with an email and the wallet is created for you. Just remember which email you used. It is what gets you back in later.
Step 1
Go to polymarket.com and click the blue Sign Up button in the top-right corner. If you already have an account, the button next to it is Log In.

Step 2
The Welcome to Polymarket dialog opens. The first button is Continue with Google. If you use it, skip the next step, since no code is sent. To sign up by email, use the Email address field below the “OR” and click Continue.

Step 3
Polymarket emails a six-digit code to the address you gave. Copy it and type it into the boxes. If it does not arrive within a minute, check your spam folder.

Step 4
Choose the name you appear under on Polymarket. You can change it later. Tick the box accepting the Terms of Use, which includes confirming you are not in a restricted region, and finish.
Done: your account exists and the wallet was created along with it. Your balance shows $0 at the top. Step 2 fixes that.

Look in spam and in the promotions tab. If it is not there, close the sign-up dialog and start again: that issues a fresh code. Old codes stop working.
Polymarket blocks access in some jurisdictions and there is no way around it. A VPN is not one, and besides breaching their terms it can cost you your account and your balance.
No. Signing up with an email already creates a wallet for you, managed by Magic, the service Polymarket uses underneath. You will only touch it in step 3.