Korg uses the Pi Compute Module 3 [0] in at least three of their products (wavestate, modwave, opsix), with Korg being one of the major synth manufacturers and overall annual keyboard synthesizer sales in the US alone being over 100K units. Don't have hard evidence but am assuming that Korg has sold more than 10K units of those three products.

[0] - https://www.raspberrypi.com/success-stories/korg-synthesizer...

"As of late 2022, Yodeck had shipped almost 50,000 Raspberry Pi-based units"

https://www.raspberrypi.com/app/uploads/2023/04/230329-Yodec...

Yoto Player is another example but I don't know how many Pi-based ones they shipped, I'd guess more than 10k but I don't know.

Spin scooters, while not for sale, number approximately 50k units and are powered by a full-size Raspberry Pi 4.