I've started leaving my phone on silent and sitting on my kitchen table while I'm working. Just having it within arms reach at my desk has become too much at times. The lack of focus wasn't nearly this bad at the beginning of the pandemic for me.
I have no idea how people can deal with their phone beeping and vibrating constantly. Actually, I get annoyed pretty quickly when e.g. my partner leaves her phone in the room.
Still, I've had to push back against the expectation of being available 24/7 and responding immediately to everything. A text that goes unanswered for a few minutes becomes a phone call or three, to ask why I'm not responding. It's bloody exhausting sometimes.