You can find what web framework is popular based on number of github star.
(on 14/Jun/2021. Data will be updated at the beginning of the month)

Rank Web Framework Language Github Star
1 Laravel PHP 65554
2 Django Python 57924
3 Flask Python 55708
4 Express JavaScript 53405
5 Gin Go 48745
6 Ruby on Rails Ruby 48535
7 Spring Java 43171
8 ASP.Net Core C# 24700
9 Phoenix Elixir 16016
10 Rocket Rust 13815