It would really help if you provided a screenshot of your relevant blocks, so we can see what you are trying to do, and where the problem may be.
To get an image of your blocks, right click in the Blocks Editor and select "Download Blocks as Image". You might want to use an image editor to crop etc. if required. Then post it here in the community.
I am done, thanks. I'll move to flutter. You guys have solution in your hands are you are still asking me to share the blocks. I have mentioned so many times that i have simple blocks. But still. Just leave it. Thanks for your time.
Given that the Custom WebViewer is not used by Zarghaam (because it crashes his App), his solution must be different - perhaps using the standard Web Viewer or JavaScript.