Those are completely normal and are (hopefully) present on every end user certificate you see on the web.
That is probably an ECC cert, as they are often only required for Digital Signature. RSA certs typically also include Key Encipherment, and certs expected to work with DH ciphers include Key Agreement.
The Basic Constraints generally ensure that these certificates cannot be used to create an intermediate CA, as they cannot be used to sign other certificates.
The not secure you are seeing is due to Mixed Content. See this Community Tip for further details.