British immigrants, what are some things about your home country you miss after moving to the UK?

Lots of my family are immigrants from India and nearly all of them hate it initially because you’re cooped up in your house and cut off from everyone. Even in summer here it’s not the same because yes you can make specific plans to do specific things, even if it’s to “hang out” in a friend’s garden it’s something you have to find out if they’re home and arrange, and it’s not appropriate to do that all the time or turn up unannounced. Even if you have that kind of friendship with someone beyond being a student/young it’s not acceptable to just turn up all the time. In India life is very “open”, you just naturally hang out with people any time, everyday, even work days. You see some people you know chilling when you drive past and you join them and it turns into an amazing hangout by the river or by the tea place, you see your friend sitting outside on their porch and you join them, then others walking past also join and it turns into a whole evening spent together with no planning or expectations. This can then become a known place to gather every night, but even if the house owner doesn’t want to they might not come out sometimes and some of you might still gather there. It’s all just good and chill. Someone is driving past you walking and say they’re off to get ice cream and tell you to get in and you do and now you’re on an outing to get ice cream with a whole group and you were just walking home from someone else’s house. You can literally turn up to anyone’s house and walk in (within reason, you approach the entry way and call out) and that’s normal and fine to do and everyone is welcoming as their doors are wide open all day. If the doors shut you understand they’re out or asleep, but otherwise they’re all open houses. It’s just such a psychologically different lifestyle. You see and meet and talk to and hang out with different people every single day, and the sun is shining and the nights are warm. People get use to life here eventually and appreciate the things they like about the UK but that openly social lifestyle is really missed and it really affects your mental health to go from that to being extremely restricted and inside the house and the weather being grey most of the time.