Original question: While this feature was previously available for our site users it now is missing. There is no gray ribbon or "send by email" button. SHouldn't all visitors be able to send or share Events and News? I'm not sure if this is a permission issue or something else. And not sure why that would have changed other than I made it a hub site recently.
Clarification on my question: “send by email” on modern pages was not showing for some users.
I thought it was a permissions issue but as clarified in the answer below, it was a browser issue. In my experience “Send by email” for a modern page shows on IE 11, chrome, and safari. Some of our users were not seeing “share by email”. Based on the answer below I assume this is because they were using IE 10 but I have not confirmed this is the version they were using.