To be clear what you mean by "share" is a public address. Like others have said I would use other blockchain explorers, like
https://blockchair.com/ or
https://blockstream.info/It has nothing to do with the fact you created the wallet offline or online, as long as the address hasn't been used before, it isn't part of the blockchain, so it "doesn't exist". However these sites should tell you that the format of the address is fine. Also, your wallet will usually not send funds to an address that doesn't work (missing a character for example) because there is a checksum integrated into the address.
Send a small amount if you want to be extra safe. However right now fees are extremely high and transactions slow, so if it's not urgent, I would wait.