When Russia wants to directly attack NATO they'll likely do exactly what the US/EU is doing and simply arm e.g. Iran/Houthis/etc with weapons/locations, let them push the button, and then go all Slava Allah or whatever while Russia is like 'oh we're not involved in this conflict you have with Iran.' Great precedent that's been set.
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That said I do expect Russia is likely involved in at least some of the incidents of weapons factories and other things that have been going boom, but it's always going to be done with plausible deniability - sleeper agents with no direct ties to Russia, and the like. They're not going to just start bombing planes in airports with drones.