If you have imported your wallet but some data is missing, it could be due to the following reasons:
Outdated data: You may have used outdated data to import your wallet. Consider exporting your wallet data again and then repeating the wallet import process.
Blockchain outage: The network connection for some blockchains may be down. Make sure to check if the blockchains of your assets are not facing any outages. If you find that this is the case, try importing your wallet again once the issue is resolved.
If you have restored your wallet but some data is still missing, it is likely that the network connection for some of the blockchains is down. To fix this, check if the blockchains of your assets are facing any outages and wait until the issue is resolved to try restoring your wallet.