You got an idea, you got a rough vision in your head on how it's going to look like and most likely you want to create a quick landing page that would showcase your idea to validate it, but finding relevant UI screenshots to show how the app would function is a pain without hiring a designer.
You can of course try to find designs from dribble that match what you're looking for but then those designs will have different colour schemes or maybe even a random logo in them
Curious to how do you usually solve this? Bite the bullet and design them yourself or try to go ahead without specific UI screenshots in your landing page?
Ehm, you would ask for permission to use those, right?
I struggled for the same issue, causing a lot of "pause" moments
It's just a block, avoid it, design yourself, you can always improve later, if it's worth pursuing.
I used Figma and Canva, but 95% of people here simply code the prototype without overthinking it.