Unable to Create or See Hero Section in WordPress Posts

I am unable to create a hero section on my single posts in WordPress. As a result, the transparent sticky header of white colour font is not visible on the single posts of my blog. Here is the screenshot of this: https://snipboard.io/Qau4vN.jpg

Nor am I able to create an alternate solution for this.
On all the other pages of my website, this is not a problem, as the hero section and the sticky transparent header is visible.

Further Details:
I am using free Astra Theme and Free Elementor page builder; To create a transparent sticky header, I used Elementor header & footer builder (for which I had selected the condition to apply for the entire website). To create posts, I used Gutenberg editor.

Can you please let me know if there are any theme settings to activate or I should install any free plugins of your recommendations to resolve this issue?

• This topic was modified 2 years, 11 months ago by praisenimmy.
• This topic was modified 2 years, 11 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic

The page I need help with: [log in to see the link]