I can't even find this on webtoon

I couldn't either when i searched on the app. It only showed up when i typed "Falling In Love With My Ex-fiances Grandfather webtoon" directly in my internet browser instead

It's on webtoon it's called Falling In Love With My Ex-fiances Grandfather

Yes we're aware it's available on webtoon, the issue is it does not show up if you search on webtoon. You need to go a general internet search for the title + webtoon to find it, which is why people are having trouble finding it despite being told it's on webtoon. I believe you were trying to be helpful, so next time you see someone is having trouble finding it please share these instructions with them instead♡

that's weird it shows up for me

It could happen like that sometime
But if you're eager to read it. Go for the author's twitter
Named Hanza
This was in Canvas vers.

Thanks for adding that! & to clarify, once you add it to your library/collection thru the webtoon link that pulls up, you'll be able to see it on the site & in the app with the rest of the comics you've saved