This might sound harsh, but it sounds like you need to take a step back and remember that immigration is a privilege, not a right. USCIS expects that CPR's are in the US and will abide by the T&C of the visa which they were granted. The ROC filing window is well known when you receive 2 year conditional residency. This is a big deal and it's probably best to shelf any travel unless it's absolutely necessary until you have this sorted out.
Yes, people travel, but you were out of country during an important part of your immigration journey and plan to be absent yet again for a long period of time. Biometrics is but one part of the process, but missing biometrics can be considered grounds enough for an incomplete application and lead to USCIS filing for immediate removal and you having to appear before an immigration judge. When issued a NTA for removal proceedings, the burden of proof for why you weren't able to complete the required tasks for your petition to remove your conditions falls on you. Because you didn't expect biometrics to be issued so quickly isn't going to serve as a strong enough argument.