I put
HTTPSProxy my.htttp.proxy
to /etc/tor/torrc
My https proxy works pretty well !
curl -x https://my.htttp.proxy https://bbc.com # works great
But, tor service stucks and unable to bootstrap:
Bootstrapped 3% (conn_proxy): Connecting to proxy
Bootstrapped 4% (conn_done_proxy): Connected to proxy
Tor 0.4.8.14 running on Linux with Libevent 2.1.12-stable, OpenSSL 3.3.2, Zlib 1.3.1, Liblzma 5.6.4, Libzstd 1.5.6 and Unknown N/A as libc.