GM won't offer Apple CarPlay and Android Auto in it's Ultium-based EVs but Honda models based on the same platform will, according to a brand spokesperson:

“Honda has very good relationships with many technology partners to provide in-car solutions for our customers, including Apple, Google, and Amazon."

"Our customers find value in our support of CarPlay, Android Auto, and Google built-in and we now offer these connected solutions across our lineup. We will continue to offer a range of high quality, interactive solutions to provide value to our customers that match their own technology choices.”