Pro Forms Update Post Meta : Add Prefix To Post Meta Value

It would be a nice enhancement to have the ability to add additional data to the post meta data.

Example would be:
replace value or append to array
date and time + what ever is in the field
This could be used to log notes added by a support technician
10/6/2023 10:15 PM - Here are some new notes.

EDIT - I was able to achieve this with an additonal hidden field and adding to an array of a custom field. This works great, but is not the most intuitive for newer users of BF. Maybe this is till a good feature request. thanks!