External trigger TICK event

I am developing an independent AR application. It works with sensors, tracking device positions, keying, compositing, playback.
Rendering takes place in UE4. To get the image, I wrote a plugin on C ++
I have a problem with different rendering times.
This is because the lack of synchronization of both programs in frequency and in ticks.
Can I make UE do global tick only on my command?
Do something like software genlock?

You should be able. Don’t know how though, need some source code digging. But if you can do it in the editor (simple example is debug) you should be able to do it programmatically.