Well that's easily fixable with low effort - at minimum make a web conference for each of the lectures, but better yet save the recordings onto a platform that students can refer back to later.
Edited to clarify filtering comment: if teachers don’t filter out low performing students who don’t make any effort to work within their environment, then the trust in a college degree as a signaling mechanism to potential employers goes away. It’s already started to go away for a variety of reasons, but graduating students who can’t do basic math and can’t regularly even attend lectures will destroy it completely within the next ten years. I say this as an employer who already has a shaky trust in a degree based off real world experience hiring CS graduates.