Can I increase the embed form height?
You can provide additional parameters for more control over the embedded form
You can pass in a preferred height to the embedjs you're using in the url like below with a height of your choice.
https://www.betterunite.com/embedjs?h=SOME_HEIGHT_AMOUNT&u=https://www.betterunite.com/yourembeddedurl?embedded=true
Alternatively you can just embed the url directly without using the embed code, and just add an iframe in your Wordpress or other hosted site page and point to the embedded url of the page as below. Which will ultimately allow you within your site designer to set whatever height you prefer for this iframe.