Tantra is about expansion rather than dissolution.
You become the all rather than breaking down self identification till only the all is left.
Most tantras are transmitted between certain yogis to students so it is hard to attain authentic wisdom.
There are some gimoires around the place, but some of the infomation may be incorrect or hard to decphier the deeper meaning.
A few modern yogic movements mix Tantraic practices into their systems. All yoga which uses Chakras and Kundalini for instance.
Within Tantra desire is not extinguished but used for higher purposes, some strands utilise sex.
Esoteric Taoism such as Qi Gong is very much about cultivating vitality and remaining spry and adaptible and amoral.