I live in a country where parental leave doesn’t discriminate between mothers and fathers (or one parent or another if it’s a same sex couple). Parental leave can be up to two years BUT it’s split into 75% for one parent, 25% for the other. I have yet to meet a man who has taken even a fraction of that 25% (aside from the paternal leave right after the baby is born, which is separate and covers a few weeks). This isn’t to say it’s an issue with men, but more an issue of a society that dissuades men from taking more than the bare minimum of parental leave, where women are still expected to take one the main caregiver role for children, and where men generally earn more than women. Until these issues are fixed and men are highly encouraged to take parental leave, just making that time available (even if a necessary first step) won’t be enough.
Edit: got my percentages wrong
This is impossible to guarantee or control for. Birds migrate, you never know who might make a pitstop at your feeder. I’ve spotted birds that were so far off their normal range it created a buzz in the local birding community. There’s a non-zero chance something endangered or at least very rare could stop by your feeder.
If you’re worried about making sure your cat gets enough stimulation there are a lot of articles and tips on things you can do that require little effort on your part (like, even a cardboard box full of crumpled paper can do the job).