77 keeps showing up when someone needs to let go of control issues. The double 7 seems connected to healing power dynamics and authority stuff - has to happen internally first though so it’s probably not about a third party or karmic partner unless you’ve already dealt with everything internally maybe.
I started seeing 77 everywhere right before my DM finally dealt with his vulnerability issues. The fact you’re both getting 77 likes at the same time probably means you’re going through similar ego stuff. That’s usually part of healing masculine wounds.