The Canon RF 70-200mm f/4L IS USM lens has been delayed until early March 2021. The company issued a notice about this and the reason behind this is due to production reasons. This telephoto zoom lens was scheduled to be released in late December 2020.

Lightweight and compact, the RF 70-200mm F4L IS USM is just 695 grams and measures 11.9cm long.
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https://www.dailycameranews.com/2020/12/canon-rf-70-200mm-f-4l-is-usm-lens-delayed-until-march-2021/