If you impose export controls on the BCM2837 (core used by Raspberry Pi 3), you’ll just get drop-in Chinese replacements like AllWinner H616 and RockChip RK3288.
It’s not that likely they’re using Pi 4 or Pi 5 SoCs because there’s a supply crunch there (28nm and 16nm respectively and both use LPDDR4) and there’s plenty of BCM2835-BCM2837 in old stock + they use a 40nm process that’s much less crowded than the current SoC silicon market.
Anything older than BCM2837 in the Pi lineup would not have enough performance for MV.
If you impose export controls on the BCM2837 (core used by Raspberry Pi 3), you’ll just get drop-in Chinese replacements like AllWinner H616 and RockChip RK3288.
It’s not that likely they’re using Pi 4 or Pi 5 SoCs because there’s a supply crunch there (28nm and 16nm respectively and both use LPDDR4) and there’s plenty of BCM2835-BCM2837 in old stock + they use a 40nm process that’s much less crowded than the current SoC silicon market.
Anything older than BCM2837 in the Pi lineup would not have enough performance for MV.