I am new here and I wonder if I will use encrypted rclone gdrives on two separate devices will the second rclone instance see name of encrypted files from the first one ?
Yes, you can you as many devices as you want.
If you setup an encrypted remote, it needs to have the same passwords / salt to decrypt. You can do that by entering in the same values or copying the rclone.conf.
I see, nice to know.
Also is there an option to send files to two different locations at once or I need to send it separate ?
You can only copy to a single remote at a time. It works by specifying a source and destination.