It depends a bit what you're doing with Systems Manager. If you're using it for Sentry WiFi, with Meraki APs (which is the best approach, if you've bought into both of those things), you definitely won't be able to do this in the same way with Intune replacing SM; it's the integration between SM and Meraki APs via a common cloud platform that makes the magic happen there.
Remember too that InTune (and SM really) do not themselves do authentication - they deploy credentials and setup to a client so that they can be authenticated by something else. In the case of Sentry WiFi, this is a cloud RADIUS residing in the Meraki cloud. If you use InTune, you then have to think about what's doing the authentication. If all you use InTune for is placing say a pre-shared key WiFI profile on the client, this would work, but the security of pre-shared keys is not nearly as good as that provided by 802.1x, which is what Sentry uses.