Making up formula

So I'm in UK but im sure the recommendations are the same across countries....

Do all of you mums who use formula always use hot water to mix the bottles? I've always used boiled water but most of the time its cooled down to room temperature

In uk they recommend water to be no lower than 75 degrees celsius when adding formula

Now this isnt always practical as a flask doesnt keep water warm enough and in places they dont give out boiling water 🤷‍♀️

My girl is 7 months old and I've mostly not used hot water and she seems fine?

But recently I've been made to feel bad for it by other mums and health visitors and wondered what I am doing to her