I guess it's rathet hard to satisfy GrapheneOS requirements in 200 bucks budget. Things like at least 5 years of updates.
Also requires a pretty new/high-end CPU for MTE and a separate secure enclave.
Why? Some cheap smartphones are really powerful enough, the Software is bloated enough to feel sluggish
That's already required if you want to sell the device in the EU (or EEA?) at all. So far, Motorola hasn't left the market with their low-end devices so I presume they intend to deliver on the updates