${m://lastname} & ${m://firstname} : from UPPERCASE to CAPITALIZE (html code)

I have a problem with data. The first and last names that are loaded in Qualtrics are all capital letters. Unfortunately, I have no way to act on this data before its Qualtrics integration.
When I contact my clients by email, it therefore displays "Hello RYAN SMITH !" while I would prefer "Hello Ryan Smith !".
So I try to get by with CSS and what seems to work on the screen when I prepare my mail, no longer works when I receive the message.
This is what i did :

Hello

!
And when I receive the email it unfortunately displays "hello ryan smith !" without capital letters.
Could someone help me with this method or another? thank you!