Personally, when I want to work on something I just turn off all notification on my Mac.

Probably reached for the phone. Turned off the alarm. Glanced at the time. Scrolled through the Slack notifications. Went through the emails. You will likely continue doing it throughout the day, approximately 2,617 more times, according to some studies. We all do it, and despite all the virtues of digital minimalism, completely giving up those habits is extreme and, arguably, unnecessary. Yet we live in a culture obsessed with productivity and these harmless distractions are wreaking havoc on it.

https://blog.nuclino.com/slack-is-not-where-deep-work-happens