I think that the core and the most importante thing for you in your ecosystem is the Macbook since you will do your primary work on it. Something better than an Air with 8GB and 256GB. A Pro 13" with 16GB/512GB?
For me, the iPad is not necessary sincerely. I have an iPad 10th and barely use it since i have a Macbook 12" 2017. If you think you will use the ipad for your workflow, go ahead. If not, think twice since you can use that money to get a better Macbook.
With the iPhone, looks like you don't need a good iPhone so, an SE 2022 should be fine but you can also try to find a second hand iPhone 12/13. It most be just a little more expensive but you get better cameras, face id and a updated design. If you will not need a super phone, you can grab a SE 2020 which work flawlessly even today and are really cheap.
With the Airpod/Apple Watch i think that they are not necessary. I had both of them and gave them to my partner and mom. Useful but they are more a luxury item than a necessary item.
With the Apple TV. My parents have one and i really really love it but it is expensive and you can use a Roku instead. Please don't buy a chromecast.. I have one and for me is one of the worst peace of tech you can buy.