Third-party wallets, marketplaces, apps, or other sites are operated by independent companies. As such we do not have any access to their systems to fix problems that are isolated or specific to their platform.
Here are some links to seek specialised support.
Subnames
cb.id help.coinbase.com
uni.eth support.uniswap.org
linea.eth support.linea.build/explore/ens
base.eth base.org/names
Block Explorers
Etherscan https://info.etherscan.com/
Beaconchain https://kb.beaconcha.in/
Wallets
Metamask wallet https://support.metamask.io/
Coinbase wallet https://help.coinbase.com/
Rainbow wallet https://rainbow.me/en/support
Uniswap wallet https://support.uniswap.org/
Marketplaces
Opensea https://support.opensea.io/
Vision.io https://docs.vision.io/
Rarible https://help.rarible.com/