This is a really good question. The answer is probably fairly individual. People seem wired to find purpose, meaning, satisfaction in different ways.
For me, “purpose” would imply an activity which, from one’s deathbed, one can look back and say: Ah, now that was time well spent.
Viewed from that angle, many hobbies and diversions, interesting though they may be, don’t really suffice to give a sense of purpose, especially when pursued as essentially solitary amusements. At least, not in my case - others differ, and in some ways the ability to find purpose easily seems enviable. But to me, the word “hobby” carries some implication of a dilettante, and reminds me of a documentary on Wallis Simpson and King Edward VIII, in which, after his abdication, touring the former colonies, there was a somewhat plaintive description of their lives as lacking satisfaction, “like being on perpetual holiday,” but without real responsibilities.
In my case, one of the most satisfying (purposeful) things has been to spend time with and reconnect with friends and family. All the other activities that are of interest - travel, hiking, reading, etc. - seem more meaningful and satisfying when combined with family and friends. Spending time this way seems to pass the test of being able to look back later and feel: Ah, now that was time well spent... that was satisfying... remember that afternoon? And so on.
No judgment implied of others who are wired differently... but this is how it is in my case.