As per the below KB, Okta provides the Cisco Meraki Wireless Radius app that ca be used to integrate the Okta Radius server agent / Meraki Wireless VPN client, however the app is private an can be assigned to your organization upon your request which can be done by creating a case with Okta Customer Support:

Cisco Meraki’s unique auto provisioning site-to-site VPN connects branches securely with complete simplicity. Using IPsec over any wide area network, the MX links your branches to headquarters as well as to one another as if connected with a virtual Ethernet cable. Cisco Meraki Client VPN Setup - YouTube Oct 29, 2018 FortiGate vs Meraki - Networking - Spiceworks Apr 20, 2020

Cisco Meraki | Auto VPN

Client VPN users may access all subnets within the network by default. In order to control or restrict access for Client VPN users, firewall rules should be implemented. Layer 3 firewall rules are a powerful tool for permitting and denying Client VPN traffic. Although Client VPN users are considered part of the LAN, network administrators may

Meraki VPN Client Setup Instructions - Telnexus

Client Configuration Installation of additional software is not required on client devices. The Cisco Meraki Client VPN solution uses L2TP over IPsec, which is supported by almost all device's built-in native clients. Refer to Meraki Client VPN documentation for client configuration instructions.