I guess, If you specify a domain like example.com, it will match both example.com and any subdomains, like mail.example.com, api.example.com, etc.
So you don't need to use the "*" wildcard.
VPN Full-Tunnel Exclusion (Application and IP/URL Based Local Internet Breakout) - Cisco Meraki Docu...
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
Please, if this post was useful, leave your kudos and mark it as solved.