While each piece of unwanted software that tries to get on your Mac is slightly different, there are some general steps you can take to check for and remove malware. The LaunchAgents and LaunchDaemons folders are usual locations to check. You should also look for unwanted browser extensions and do an audit of the files in your Applications folder.
How to add, remove, and configure Mail accounts in iPadOS 18
iOS and iPadOS used to have a top-level Settings group simply called Mail. From here, you used to be able to add,...