Can anyone recommend a editable calendar?!

Can anyone recommend a way around?!
I’m currently building a website for a client, and they are wanting a calendar that they can access and edit, but doesn’t need access to our whole webflow account as we have other client’s websites on it. So giving her “site access” might not be possible. I have a subscription with Elfsight that can create a calendar widget and it publishes from there, but is there any other way to do this? Thank you in advanced!
Here is the read only link for the site I’m working on now.

Depends on the admin UX and end-user UX you want, but Google calendar with might work for you.