https://wccftech.com/apple-confirms-that-future-arm-macs-will-support-thunderbolt/

Apple has confirmed that despite its move from Intel to ARM-based processors on Mac, it will continue to support Thunderbolt in its future Macs with Apple Silicon. The announcement comes on the same day as Intel announced Thunderbolt 4 and its specifications.

Apple Silicon-based Macs are expected to be announced by the end of this year. The company has not yet released any ARM-based product with support for Thunderbolt - including the iPad Pro which has a USB-C port. Even the Developer Transition Kit Mac mini, which Apple released in June to a specific group of developers, does not support Thunderbolt. This let to questions regarding the future of the standard that Apple was instrumental in developing alongside Intel.