Does Google access my iCloud email through Gmail app
If I use the Gmail iPhone and iPad apps for my iCloud email, can Google access my iCloud email that is shown in the Gmail app?
Do they and can they?
If you enter your iCloud password into any app or code (including safari or Apple OS devices), it surely can act on your behalf. Whether that app saves the password securely or not or retransmits any or all of the data or has a switch or timer to enable this periodically is a lot harder to discern.