I need a HTML code Edit & WordPress Help

Dear freelancers,

❗️I need help with a html code, also i need some help on my wordpress website to implement correctly that html code what you will edit.

The html code is done, it just needs some fix and improvements

?? I will send a short video about the issue i have.

❗️You have to have knowledge in:
Wordpress, 2D Barcodes, HTML, Java