Thanks to @top_secret @RufusDawes for the tips above, we went to the Consular Outreach here in Atlanta to update my Filipina spouse's passport name change. We met many fine folks who drove in from all around the southeast just for this outreach. Here are some things that might interest others who may need to do the same.
1) In addition to organizing all the required documents for a passport renewal name change,
https://philippineembassy-dc.org/e-passport-renewal/
registering and scheduling is highly recommended and the spots get filled up fast.
https://www.passport.gov.ph/
Even though the outreach site says walk-ins for passport renewals are welcome, we met a couple from out-of-state without an appointment and they told them to wait till the end of the day to see if the spots become available.
2) For the "Original or notarized copy of proof that the applicant is still a Filipino and one (1) photocopy. Such proof may be, but not limited to, a green card, visa, notice of action, work permit, or dual IC.", we made 2 photocopies of the green card (front and back), and wrote on top "This is a copy of the actual I-551, Permanent Resident Card" and signed and notarized at a UPS office for $10. Also, took the actual green card for the passport officer to verify as well.
3) The consulate officer will try to push the Philippines voter registration as part of the passport renewal. Technically, that is separate and not required. But bureaucratically, just go along with it because the passport will already take 6-8 weeks. The last thing you want is to piss the officer off to where your passport application goes to the bottom of the pile or lost. The passport officer probably gets more credit for more voter sign-ups. This was what another Filipino told my spouse while waiting in line so she went ahead and registered to vote for the Philippines as well.
Plus, the voter registration provides a 2nd valid Philippines ID name change along with the passport. For those who have ever tried to name change in the Philippines, having 2 IDs already makes the next ID change easier.
Has anyone else ever experienced this? Or can verify?
Or have other recommendations? Thanks.