If a webpage doesn’t contain enough text up until the end of the fold, a sticky “call now” bar might appear flying somewhat above the middle of the fold, instead appearing as the last element above the fold.
If you ensure that there is one container before the sticky bar holding all the other content then you’d give that container a min-height of 100vh.
As mentioned in the other thread 100vh means something different on mobile so instead you would set html and body to height:100% and then use min-height:100% on that container.
If you meant without touching the html then there probably is something else you could try but it depends on the structure of the html you currently have.
I’m on a mobile at the moment but I will have a look when I get back to my computer later today.
It looks like youur html has the same structure as shown in my codepen above. You can add the rules to your mw-wrapper and body as shown in the codepen…
You should be ok as it looks like your structure matches the method I mentioned anyway. Just add the css and target your wrapper and html body elements as suggested in my codepen.