I wouldn’t recommend it. Your TV likely allows you to adjust by adding a delay. Given that there is already a delay on an analog input on any Sonos device, the sync between what you see on the TV screen is going to be ahead of what you hear.
I have never run across a TV set that is capable of sending the audio out before what is shown on the screen, but your set may be different, and I would certainly be interested in the make and model if you can adjust the audio in a negative direction.
Once you’ve set up an analog line in on a Sonos, it doesn’t vary in the amount of delay, unless you go back in and adjust the settings.
Sonos sells two speakers that are designed to work with most TV sets, the Beam, and the Arc. Either of them would be a substantial upgrade than using the stereo only analog line in on the Port, and give you at least Dolby Digital with 3 speakers that are built in, the center, left and right speakers. You could then add a pair of surrounds if desired, and a Sub, as time and finances permit.