The personalised link approach is sound. Most teams write off that calendar drop-off as inevitable, but honestly the real unlock for us was what happens after the click, not the link itself.
When someone lands on a booking page and doesn't convert, their intent is sky-high. They physically got to that page. Something interrupted them or they got cold feet. That's the moment to pick up the phone. Same day, within a few hours - not another automated email that lands in the same ignored inbox. A real person calling and saying "hey, noticed you were looking at my calendar; wanted to see if you had any quick questions before we jump on a call."
We've been doing this at my agency, and it flips that 30% drop-off into roughly 60% booked. The personalised link gives you the signal; the call gives you the close. They work together, but most people only run half the playbook.
For the automated workflows you're building though, there's another angle worth testing. Instead of shoving them back into a generic sequence, send a super short one - literally one email. "Saw you checked my calendar. If the timing was off, no worries - here's a direct line if you want to chat." No link, just your phone number. Keeps it human.