SSL crt and key files

[Revoola]

I am using a plesk ubuntu 22 server which as i understand it uses nginx and apache and when i google which folder the ssl certificate is stored in , the result is a single file in /usr/local/psa/var/certificates/

this explains it https://talk.plesk.com/threads/ssl-certificate-files-location.336076/

but the server.py is expecting two files with a crt and a key extension, is there a way to run https listening with a plesk based server ie where the certificate is stored in one file