I have some datetimes which are stored as UTC time. Usually this works well - when a user views the datetime through the Portal, Form, etc. it automatically converts to their local time zone.
Now I have a flow which sends out an email including a UTC datetime field as dynamic content. The datetime doesn't get converted as it isn't being viewed by a signed in user.
I want to convert it manually based on the recipient (recipient email is pulled from the contact table, so I have the contact record). I can see that the Contact table has a column called Time zone. This column doesn't seem to work. It seems to behave like a lookup column but doesn't have any options. I cant type in the field or use the drop down arrow to make a selection. I've tried both in the table itself as well as in an edit form.

How is this column type supposed to work? I can see that Time Zone is a full on data-type and I can create new columns with type = Time Zone, but they all behave like this. Is this just not implemented? It would be really useful for me if it works.