Starting apache httpd prompts for a passphrase string text like below

$ echo -n "mypassword" | /web/apps/perf/apache/2.4.46/https-model/bin/apachectl -k start
Apache/2.4.46 mod_ssl (Pass Phrase Dialog)
Some of your private key files are encrypted for security reasons.
In order to read them you have to provide the pass phrases.

Private key model.com:443:0 (/web/apps/perf/apache/2.4.46/https-model/ssl/model.key)
Enter pass phrase:

I tried the below options to pass the password non-intractively but none of them work.

1. echo -n "mypassword" | /web/apps/perf/apache/2.4.46/https-model/bin/apachectl -k start
2. echo "mypassword" >> /web/apps/perf/apache/2.4.46/https-model/bin/apachectl -k start
3. /web/apps/perf/apache/2.4.46/https-model/bin/apachectl -k start << echo "mypassword"
4. /web/apps/perf/apache/2.4.46/https-model/bin/apachectl -k start << cat mypasswordfile (where mypasswordfile is a file having the password.)

Can you please suggest?