Your sound is heard by you through bone conduction. The voices of others are heard through air-conduction.
If you sound to yourself the way others sound to you, you likely have gripped the larynx with your tongue muscles to increase bone-conducted sound and will probably not sound great to your listeners.
If you sound to yourself not so great, chances are good that you have released the larynx with your tongue muscles, decreased bone-conducted sound and will probably sound great to your listeners.
Bone-conduction usually leads a singer to use more heavy mechanism than is needed, and to constrict the larynx.
“Only when proper training has inculcated the ability to feel the correct sound does the ear finally become conditioned to the correct sound.”
We have to learn to sing by sensation. The problem is that there is more than one-way to produce a sensation in your body, and an unhealthy sound can produce similar sensations to a healthy sound.
I remember saying often to my teacher "The sensation is exactly as you have described, yet nothing like what I expected it to feel like."
Learning to sing is a process, and it takes plenty of give-and-take to align healthy sound with healthy feeling.
Eventually they will become conditioned to the correct feelings.
In the mean time, you can use your ears to detect pitch, balance of heavy & light mechanism, and level of compression through auditory feedback from the singing space.
But not whether you “sound good” or not.