I have had great success with two client profiles: small business founders/startup entrepreneurs, where my coaching is broad-based, and product managers/directors, who have job-specific situations to address.
As mentioned above, a regular call cadence is great, and I'm flexible with format. My longtime mentee calls me every week by phone with the occasional in-person walk. My last two enterprise and accelerator coaching engagements were on weekly or biweekly Zoom chats. And I'm happy to be available via DM for smaller or emergency requests.
I'm probably less useful for enterprise employees, as I've never really worked in them, and don't know the cadence and politics involved in organizations with hundreds of staff at the same peer level. (At Citi, for example, I was on a team of 7 in an isolated department, and repeated efforts to find employment with the consumer bank fell flat.)