I recently activated the extended security updates for my chromebook (it's just old) but I still used it with certain productivity apps, the fact is that with the extended updates I no longer have the playstore or the apps I used

Does anyone know a method to install apks?
I already tried with the linux serial panel and putting chrome in developer mode but it won't let me because the step of enabling developing android apps is missing (which doesn't appear)

I just need to reinstall the chrome os with recovery method 2, but I wanted to collect opinions or experiences if anyone knows about the subject