Best answer by Castorr91
That sounds really inconvenient so lets see what we can do about that.
In Streamlabs OBS you want to make sure that you disable stream delay under Settings -> Advanced.
If you furthermore need to lower your stream delay it has to be done through the website.
Twitch has low-latency mode, Mixer got ftl and YouTube have low & ultra-low latency modes you can enable.
Let me know if this answered your questions!