Objectively, I know I should leave.

The company hasn't been doing well. At all.
Projects are a shit show.
Despite everything everyone is kind and respectful, though.
My team's great and boss is good.
Pay is okay, too.
As the lead dev I am appreciated for my work and knowledge.
But the company itself seems unable to learn despite the coworkers being young.
My team doesn't have any work now because the customer canceled the project.
There have already been layoffs. 40% of people gone.
Other companies also pay well.
But damn my team is amazing.
Although I am the most experienced developer. But I know I am not THAT experienced, really. i am still young and would love to work with someone MORE experienced.

Maybe i am just lazy. Then I will likely soon be lazy and unemployed.
Oh no....

Be prepared to send recommendation requests to your network on linkedIn. I have many references, also international and got mostly invited for a talk. And normally i'm in then. But this week i replied to two companies. I said upfront that i'm not directly available, maybe that was the reason, but they ghosted me while they contacted me themselves using linkedin email. It's so unprofessional, you should treat each other with respect right,, you never know if you encounter each other in future.

About your situation, stay as long possible if happy there, i left ship to early once at a great company. For security, do they give a few salaries to laid of people? Then totally stay, imagine having a few months vacation while slowly seeking for job when you get laid off. In that case you have money and vacation + luxory of being critical about your new employer instead of hasting to get hired

Yup, alnmost all got compensation when they were fired.

But frankly we're only 2 devs in the entire company and there is almost no work left for us... So, yeah :/

I agree with @retoor, be happy while you can. Use this time to learn new skills like code labs on different languages, boost your resume, try new devops techniques.
Be ready to leave when the time comes.
And since you are not taking too many responsibilities, bulk up. Get some more gym time when you would otherwise be solving bugs or tired because you solved bugs the whole day.
But remember it won't last. You need to be on an active place with experienced people to improve your skills. Sooner than it seems the day of packing will come.