It also turns out that non of the Exodus help pages work for users in the UK! Why this should be I don't know but is a bit poor from Exodus. I think I need to change to a different wallet (not Exodus).
I thought they could be referring to something else, but since you said ETH (Ethereum). I thought you were mentioning the network they asked you to fund the ETH for.
As for your second issue regarding the help pages, then I'm not sure. I don't see any similar reports in their Reddit:
https://www.reddit.com/r/ExodusWallet/search/?q=UK
If UK residents were blocked, you wouldn't be able to access the wallet in the first place, not just the help pages. But a workaround would be to just use a VPN.
For similar wallets (closed source): Trustwallet, Bitget or OKX wallet.