Any way to get notifications sooner?

With every version of Android it seems to be harder and harder to get real time notifications anywhere near real time.

Twitch notifications, Signal, WhatsApp, I often get these ten to thirty minutes too late.

I've excluded them from battery optimisation but that doesn't seem to do anything. And I can't find anything else.

I don't care about battery usage. I'm always near a charger.

Android 13 on a Fairphone 3.

Edit: I've disabled DOZE according to https://stackoverflow.com/questions/40204605/android-completely-disabling-deviceidle-doze-in-android-m Hopefully that helps.