As a general rule no judgment entered pursuant to the default of a defendant can grant any reliev other than tha prayed in the petition or complaint. this is a matter of Constitutional due-process dimension.
Best wishes for an outcome you can accept, and please remember to designate a best answer.
This answer is offered as a public service for general information only and may not be relied upon as legal advice.
In a default case, the Judge has to follow the same laws that apply in a contested case, i.e., to divide net community property 50/50. One thing that you could do in your case is to Notice your ex's Deposition with a Notice that includes a Demand to Produce Documents at his Deposition, so that you (or preferably an experienced Family Law Attorney) can conduct the discovery to determine what other community property may exist, or have existed as of the date of separation, and its value. If you choose to do so, you should retain an experienced Family Law Attorney to advise and represent you, to do that discovery and take the case to Judgment.
Please note that this answer does not constitute legal advice, and should not be relied on, as each situation is fact specific, and it is not possible to evaluate a legal problem without a comprehensive consultation and review of all the facts and court pleadings filed in the case. This answer does not create an attorney-client relationship.