@OhToBeASeahorse is your partner on leave? In very early days DH took DC1 out in the mornings (no playgroups on due to covid) but would just take him to the park, then cafe once they were open.
Back around 12:30pm for his afternoon nap. Meant I had all morning to feed and have baby on me.
DC1 inconsistently doing afternoon naps, if he doesn't nod off we still leave up in his cot for an 45mins-hour for down time, as he's usually lying down/chilling.
That all got us up to about 13:30, which leaves 3.5 hours until dinner at 17:00 to fill. This is still kind of tv, FaceTime friends and family, start prepping dinner time. We all have dinner at 17:00. Normally done by 18:00 at which point DC1 would have about 30-45mins of play then bedtime.
We have a pretty set routine for DC1 too but flexible as to whether me or DH do it, sometimes it's felt like the only bit of quality time I've had with DC1 that day.
Now we're at 3 months that afternoon part for the day is still a bit of a muddle but a bedtime routine has emerged where on of us will get DC2 ready for bed at 18:30, I give her a feed and then bed. Then one of us will get DC1 ready for bed at 19:00. No consistency as to who does who, sort of just who feels they need more time/have energy with the respective child.
Mornings are easier now as it's case of dressed, fed and out for a walk/park/toddler group as they are back on.
Hope that helps. It's all felt a bit muddling through, but now we're at the end of the beginning as it were, so things are starting to settle (a bit).