HTTPS Proxy curl - bash

Question

i am use
curl -x https://www.skillacademy.com --resolve www.skillacademy.com:443:104.18.24.139 https://www.skillacademy.com:443 -vvv
output is
root#localhost:~# curl -x https://www.skillacademy.com --resolve www.skillacademy.com:443:104.18.24.139 https://www.skillacademy.com:443 -vvv
* Added www.skillacademy.com:443:104.18.24.139 to DNS cache
* Hostname www.skillacademy.com was found in DNS cache
* Trying 104.18.24.139:443...
* Connected to www.skillacademy.com (104.18.24.139) port 443 (#0)
* ALPN: offers http/1.1
* CAfile: /etc/ssl/certs/ca-certificates.crt
* CApath: none
* (304) (OUT), TLS handshake, Client hello (1):
* (304) (IN), TLS handshake, Server hello (2):
* (304) (IN), TLS Unknown, Certificate Status (22):
* (304) (IN), TLS handshake, Unknown (8):
* (304) (IN), TLS handshake, Certificate (11):
* (304) (IN), TLS handshake, CERT verify (15):
* (304) (IN), TLS handshake, Finished (20):
* (304) (OUT), TLS change cipher, Change cipher spec (1):
* (304) (OUT), TLS Unknown, Certificate Status (22):
* (304) (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN: server accepted http/1.1
* Proxy certificate:
* subject: C=US; ST=California; L=San Francisco; O=Cloudflare, Inc.; CN=sni.cloudflaressl.com
* start date: May 10 00:00:00 2022 GMT
* expire date: May 10 23:59:59 2023 GMT
* subjectAltName: host "www.skillacademy.com" matched cert's "*.skillacademy.com"
* issuer: C=US; O=Cloudflare, Inc.; CN=Cloudflare Inc ECC CA-3
* SSL certificate verify ok.
* allocate connect buffer
* Establish HTTP proxy tunnel to www.skillacademy.com:443
* (304) (OUT), TLS Unknown, Unknown (23):
> CONNECT www.skillacademy.com:443 HTTP/1.1
> Host: www.skillacademy.com:443
> User-Agent: curl/7.85.0
> Proxy-Connection: Keep-Alive
>
* (304) (IN), TLS Unknown, Certificate Status (22):
* (304) (IN), TLS handshake, Newsession Ticket (4):
* (304) (IN), TLS handshake, Newsession Ticket (4):
* (304) (IN), TLS Unknown, Unknown (23):
< HTTP/1.1 400 Bad Request
< Server: cloudflare
< Date: Tue, 18 Oct 2022 06:57:20 GMT
< Content-Type: text/html
< Content-Length: 155
< Connection: close
< CF-RAY: -
<
* Received HTTP code 400 from proxy after CONNECT
* CONNECT phase completed
* Closing connection 0
* (304) (OUT), TLS Unknown, Unknown (21):
* (304) (OUT), TLS alert, close notify (256):
curl: (56) Received HTTP code 400 from proxy after CONNECT
Look at Establish HTTP proxy tunnel to www.skillacademy.com:443
Why still HTTP not a HTTPS ?
what i try :
update openssl to latest
update curl to latest
Here output
root#localhost:~# curl -V
curl 7.85.0 (aarch64-unknown-linux-gnu) libcurl/7.85.0 OpenSSL/1.1.1q zlib/1.2.11
Release-Date: 2022-08-31
Protocols: dict file ftp ftps gopher gophers http https imap imaps mqtt pop3 pop3s rtsp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS HSTS HTTPS-proxy IPv6 Largefile libz NTLM NTLM_WB SSL threadsafe TLS-SRP UnixSockets
root#localhost:~# openssl version -a
OpenSSL 1.1.1q 5 Jul 2022
built on: Tue Oct 18 06:23:52 2022 UTC
platform: linux-aarch64
options: bn(64,64) rc4(char) des(int) idea(int) blowfish(ptr)
compiler: gcc -fPIC -pthread -Wa,--noexecstack -Wall -O3 -DOPENSSL_USE_NODELETE -DOPENSSL_PIC -DOPENSSL_CPUID_OBJ -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DKECCAK1600_ASM -DVPAES_ASM -DECP_NISTZ256_ASM -DPOLY1305_ASM -DZLIB -DNDEBUG
OPENSSLDIR: "/usr/local/ssl"
ENGINESDIR: "/usr/local/ssl/lib/engines-1.1"
Seeding source: os-specific
root#localhost:~#
any help will apreciated