I assume that this page is generated dynamically rather via post request rather than with a fixed address. So, basic scrape sensor would not work for you, you should investigate exact network calls using google chrome inspector window and see how this content is generated.
If you can open this page in a new browser window and you can see the content via javascript disabled, it is good scrape, otherwise, you should find out what us being post between pages. I feel like it is not straight forward, again use google chrome inspector
i find it funny that when i search “pn-70ta3 home assistant” i find your post from like 4 years ago
anyway when developing for the scrape sensor, try using something like curl to see what home assistant is actually scraping
also try removing your value_template? that may/may not make it easier to debug