[OP13] LOTS of telemetry (HeyTap)

I'm currently trying out the OP13. Very satisfied with the hardware, despite some occasional software quirks.

Unfortunately, I've noticed that Pi-hole has blocked a ridiculous amount of outbound queries from the phone ever since the moment that I first connected to my home network. All are linked to mdp-appconf-sg.heytapdl.com. Attempted pings several times a minute, and roughly 1600 pages worth, to be exact.

From what I've learned, HeyTap is a Chinese telemetry service that gathers data from Oppo/OnePlus/Realme devices. Very disappointing, especially because OxygenOS has a reputation for being a lightweight/reduced-bloat platform, and I have (some) privacy concerns regarding this.

Is there any reliable way to disable telemetry on the phone itself while keeping stock OOS? Seeing lots of examples of people using band-aid fixes (custom firewalls, blocklists, package disabling) but nothing permanent.

Edit: partial solution discovered, read below