I've also done a few other things but still not working.

1. I've tried to generate relative urls but still showing absolute.

2. I've enabled TrustHosts as described on the docs https://laravel.com/docs/10.x/requests#configuring-trusted-proxies since my ec2 is running behind the ELB but still didn't work.

3. I've also tried to force https schema on the web.php routes file since I've seen some projects doing this but also didn't work.

if (config('app.force_https')) {
    URL::forceScheme('https');
}

4. I've checked and I have it already on the TrustProxies the ELB header. Request::HEADER_X_FORWARDED_AWS_ELB;

Is the APP_URL in your .env file with https?

It is

api app APP_URL=https://api.mydomain.com.br:${APP_PORT}

app APP_URL=https://painel.mydomain.com.br:${APP_PORT}

Did you run php artisan config:cache after changing the APP_URL values? (Or is the config not cached) else it keeps the old values.

Else it need to be something with your load balancer but to be honest I don't know how to solve that.