HTML Frames inside WP?

I have read all the other posts about this topic, but they don’t apply.

I am a real estate agent and I want to embed an external URL: https://mlssearch.topproduceridx.com/ScottFicek into my blog page: https://minnesotainvestmentrealestate.com/properties so that a when a customer uses the external URL, they stay on my site (I am fully licenses to use the external link as I need).

I tried frames, but WP just ignores the code. Any help?