thanks for your reply.
I had a look at what you referenced.
Since I'm not using any application like WordPress, there is no .htaccess file in my directory except for those of certain frameworks (codeigniter, laravel, etc.). The only two apps in my bitnami folder are "letsencrrypt" and "phpmyadmin"
This is also why the Bignami HTTPS Configuration Tool was so helpful to me as it automatically picks the right files to modify. After I had used it I discovered that it changes "/opt/bitnami/apache2/conf/bitnami/bitnami.conf". So maybe that is the right file.
Creating a new htaccess.conf file might be another option. But then the question is where to best put it to maximize security.
Thank you very much and kind regards,