Oviously Apple is a customer. But nothing I would give too much hope for the future:
Apple is one of the biggest two customers, there are the only two customers (100% in 2020).
Apple was the source of the bigger part of incredible 7.881 $ revenue in 2020 (page 9). So it´s 4.000 $ or more. Hengtong Rockley made the rest - oviously a subsidary or something very related to Rockley, no?
Quite minuscule, but existent.