Everyone thinks I’m crazy for saying this, but I like Microsoft ToDo. And I’ve tried dozens of them. I’ve been using the Microsoft one for the past two years every day.
Microsoft ToDo has native apps for Mac and Windows, and a third-party one for Linux (https://itsfoss.com/kuro-to-do-app/). It has apps on iOS and Android and you can access it via the web.
It works very well. It even _finally_ (in 2023) made me switch from paper grocery lists to electronic ones.