does doh reuse tcp and tls connection？

[Nyx2022]

hello, as the title, i wanna know if some upstream in dnsproxy such as doh will reuse the tcp connection to sppedup query and decrease neicun usage?if not, can you add this feature

because i found it will cost more times when i use 2 https dns server to query a lot of domians than only 1 htps dns server