To show e-visa (online BRP) at the airport

Hello everyone, First of all, I want to say how much this subreddit has been helpful!

I just want to ask this question.. I have a BRP (skilled worker route) but it’s online version which I assume many of us now. Traveling Europe is fine to show the evisa when I’m asked at the airport where I fly back to the UK from, as I still have an internet in Europe without wifi. However, when I go somewhere outside of Europe where I can’t use my internet, how you all manage to show the evisa? Most of the airports have wifi but even so sometimes not working (experienced a lot). As the online version cannot be downloaded such as PDF, I am so worried how can I show them if I don’t have an internet? If you have any tips/experiences, please could let me know? I am going to Morocco for the first time and I won’t have internet without wifi there and I’m just so worried when they ask me to show the e-visa, but if I’m not able to use internet, I’ll be panic. Does screenshot work? Which I’m a bit doubtful.

Thank you so much.