String not showing up as option to translate

Hi,

I need to translate a price amount for different languages on a pricing table, however it is not showing up on the translation options. It is a table from the theme I am using… I’ve tried the different options on the advanced settings but it didn’t work…
Would really appreciate your help solving this.

Here’s a screenshot of what I mean: https://i.ibb.co/whsJHQF/gfdagadsfg.png

And this is the HTML code for that:

<div class="pricing-price">
	<span>
		<sup>kr</sup>300		<sub></sub>
	</span>
</div>

Thank you