Lymphatic system and the thyroid

So I have had an hypothyroid for 11 years now; diagnosed at 19.

I have always been bad for advocating for myself when it comes to this and have never felt like my symptoms have ever improved.

I did express my concerns about the lack of improvement in my symptoms but due to labs good it was brushed off and I was told I just need to exercise and lose weight. I started on 25mg and eventually got up to 50mg as I kept complaining of lack of improvement.

That was years ago and still feel like my symptoms have never improved. Yesterday I read a post about the lymphatic system and it’s link to the thyroid but low and behold it was basically an add selling lymphoria; a herbal supplement that targets all areas of the lymphatic system and in turn helps with the thyroid.

Does anyone know this to be true, or tried this?

Any advice for a chronically fatigued 30 year old who is desperate to stop feeling like I’m 40 years older than I am!?