My understanding is Iranian Zoroastrians and Indian Zoroastrians have very different traditions. Many in common but many that are an inherited from their 1000 years apart.
Specifically, Zoroastrians (both Indian and Iranian) have a few annual traditions (https://theguibordcenter.org/zoroastrian-holy-days-and-obser...), and like 4 life-milestone traditions (e.g. https://en.wikipedia.org/wiki/Navjote, Wedding, Death, etc). I believe all of these are very similar.
There are many differences tho, mostly based on "sibling-culture". For example, my cousin recently had a wedding (to another Indian Zoroastrian) and there were a lot of Indian traditions included (Iranians would not do these). Indian Zoroastrians celebrate a lot of Indian Hindu traditions (e.g. Holy, Diwali, etc) and similarly I'm sure (I don't know for fact) Iranian Zoroastrians celebrate a lot of Iranian Muslim traditions (e.g. Eid).
Even the choice of clothing is more inspired by their surroundings than their religion. However, the do share a common tradition of wearing particular undergarments (https://en.wikipedia.org/wiki/Sedreh, https://en.wikipedia.org/wiki/Kushti).
Food again has a similar story. Mostly from their surroundings, but some commonality. e.g. Parsi's use a lot of spices in their cooking (https://en.wikipedia.org/wiki/Parsi_cuisine). But the dessets are typically more middle-eastern ("Common desserts include sev (vermicelli), ravo (sweet semolina pudding) and malido (a nutty fudge). Also popular are faluda and kulfi, both of which are adoptions from the cuisines of the Irani and Persian-speaking communities.")
You'd find it quite difficult to find http://www.nilouferskitchen.com/2014/12/parsi-sev.html or anything similar in any Indian dessert shop, but as per my understanding shares a lot in common with "Halawat Sha'riyya" or "Sh'ariyeh be-sukkar".
There is a Parsi breakfast https://en.wikipedia.org/wiki/Akuri that shares a lot in common with Menemen (Turkey) or scrambled Shakshuka. Akuri differs because it is also Indian and meant to be heavily spiced, and many times meant to be spicy. If any of you ever are in London try out https://www.dishoom.com/food-drink/ their Akuri is NOT on point lol - its adapted for a British pallet -, but if you add a bunch of Salt and Chillies (they provide them on request) then it becomes very representative. The Keema Per Eedu is on point tho! and mixing some of that spicy sauce into their "Akuri" will also work to make representative Akuri.