Listbox item delimiter prevents you from using commas as values

[Giesama]

(Google translate from german)
Hello,

I have the following problem. I have created fields “First Name” and “Last Name”. In the "Title" field I selected "Listbox" and gave the following 2 options:
{s:lastname}; {s:first name},{s:username}
So either the title will say “Mustermann; Max” or “m.mustermann” (m.mustermann would be the username). However, instead of a ; prefer a , have. But the comma is already the separator. Is there a possibility?

[Giesama]

Here's an example. Instead of a ";" I would like to have a "," there

[mitchcapper]

I could potentially try to add basic escaping of the list separator that might work (ie you would do , to get an actual comma). Would that work?