Interesting question OP.
I'm not really patriotic in the typical sense of the word, I do like England and enjoy living here to the extent , but with the state of the economy and the cost of living crisis etc it is not really something I can feel "proud" to be a part of at the moment. I don't feel patriotic towards a country where many of us are struggling to keep afloat.
However, I feel patriotic in the way that I feel a strong sense of belonging in England. I was born and raised here and most days I walk along the same roads, visit the same towns and spend time on the same land my ancestors lived on for centuries. There are buildings both up North and down South where my great, great, great, great grandparents lived in which still stand and I felt a huge sense of pride when I visited those same buildings. To walk up the same garden path that over 200 years ago, my same relatives did. It's very special to me.
I have family trees from my mother's side and father's side, both families I can trace back to the 1500s. In Tudor England, relatives on my mother's side of the family were working, living and walking the streets of the town I still work in today. To be able to visit the same places they did makes me feel proud to live in this area. Not so much "patriotic", but I suppose I'm trying to do my bit keep the town a nice place to be to keep it for future generations as my ancestors did for me.
By giving both my parents 23andMe DNA tests for Christmas under the sneaky guise of "see where your ancestors are from!" I was able to get a more detailed view of my own ancestry, from both my mother's and father's lines.
My father's family came across from Scandinavia with the Vikings and settled here, staying ever since. My mother's side is almost 100% British, with a tiny percentage of North African (given the small percentage, it is likely to be a Roman soldier during the Roman occupation of Britain who had relations with one of her ancestors).
The point I'm trying to make is that my ancestors have been settled here for over 1000 years on my father's side and even more on my mother's side. Britain is home for me and everything about all of the ancestors I've traced has happened here in this country. I am proud to know so much about my ancestry and I believe that makes me patriotic in the sense that I feel pride in knowing where I come from, how they lived, what they did, where they went and knowing I can walk those same streets and fields. I feel a connection, more than patriotic. I think patriotism comes in many forms and is different and personal to every individual.