One detail that remains to be seen is whether you'll cater to the EU market, and how the impact of the memory crisis will impact the possible consumer-base. It's a weak market and sales are likely to be only the 'hardcore' users who demand/require security. I sincerely hope there are no numbers you need to hit to keep the partnership going. Sales are not likely to be at first significant, people are extremely price sensitive and I'm not sure GrapheneOS support will draw people in enough to justify the obviously now inflated costs to cover component price increases (and tariffs).

Pixels offer affordable options which is why unless you can cater to that market, a Motorola-only GrapheneOS future will only gain traction if you're able to get a cheaper low/mid-range option out there, akin to the Pixel A-series.