Custom HTML Tag stripped

Hello, I noticed some custom html tags gets stripped automatically when switching editor style from text to visual. I am using SmartFrame embeds in classic editor and they look something like this:
<script async src="https://static.smartframe.io/embed.js"></script><smartframe-embed customer-id="customer_id" image-id="image_ id" style="width: 100%; display: inline-flex; aspect-ratio: 2560/1706; max-width: 2560px;"></smartframe-embed><!-- https://smartframe.io/embedding-support -->
When I switch from text to visual it will automatically strip . One solution I found was hooking into tiny_mce_before_init and works fine, but would you be able to implement this globally into the plugin? Thank you very much!