Re-engineering the add iframe function in wordpress theme knowing Vue.JS and php

I want to change the function that is already in the purchased theme in Wordpres

It works so that when you add a video from Youtybe turns it into an iframe and displays on the page.

I would like it to work the same way but not for youtube video but for Matterport virtual tour

https://my.matterport.com/show/?m=XXXXX

Iframe for such projects is the same as from YT but unfortunately it does not work for me in this theme.

<iframe width='853' height='480' src='https://my.matterport.com/show/?m=XXXXXX' frameborder='0' allowfullscreen allow='xr-spatial-tracking'></iframe>

Theme support recommended finding someone who knows Vue.js and php to rework this feature.

Please give me a quote for this job

What to do

Find this feature in theme files

Modify (two display locations - project upload page, project subpage)