There is a bug in Aegaeus theme version 4.0 where some meta fields are hidden.
This issue will be fixed in the upcoming version 4.0.1, which will be released as soon as possible.
Fix Steps :
1. Open AegaeusWP > includes > js > hide-meta.js
2. Delete the whole content in that file, BUT DO NOT REMOVE THE FILE. Leave it empty.
3. Save the file and re-upload to your server.
4. All meta field options will be available now.
Let us know in the comments below if you are having some issues.