Out of curiosity , have you ever encountered any malware that exploits said CVEs? If a month delay would be so dangerous, Android users, even of new devices would be getting pwned left and right, let alone Android users of device no longer getting patches.
Source: Android user of old phone who hasn't been hacked yet so I'm not sure where exactly the dangers are, as the attack surface is mostly the web browser and the apps, both of which are scanned and covered by up-to-date patches from Google Play Store/Services even on my ageing phone. So as long as you don't browse extremely dodgy websites, and don't download shady apps you should be good as nothing else can't get to the Kernel CVEs on your unpatched phone.
Yeah, I'm sure some crafty malware dev can whip out a targeted virus that can exploit the chain of open CVEs on my particular phone through a MMS message or something, but I'm not sure targeting the 100 or so users left still using this old OnePlus model that's worth less than 20 Euros used (pointing to a user without much income), is a good use of their skills and time, when they could be frying much bigger fish with that know-how like going after Microsoft's Azure or something.
Nor am I being targeted by state actors who have these means. And if you are being targeted by state actors, they have access Zero-Days that even Apple or Google haven't patched yet so you're not safe anyway no matter what phone you have.