Force check for notifications without checking phone

When i haven't checked my phone (One Plus 6. Running OxygenOS 10.3.12) for a few hours, when i finally check it it lags like there is no tomorrow. My guess is that it requests and then receives a crapton of notifications, which causes the lag. I can take that guess because when i check my phone, nothing is new but after 10-15 seconds it seems to open the floodgates and i receive 20-30 notifications all at once. Is there a way to tell android to do a check for new notifications every x minutes, even if the phone is left undisturbed?