One thing we have to deal with is, that when we mix our production in a hifi environment, most of the people listen them in poor listening environment: even with mobile phones in noisy background.

One famous Finnish producer told me, that he makes a copy of his song, he is working on, on a C-cassette and listens it in his car with C-cassette player. That was in the late 1980s. This check to make sure, that the most important elements of his song were heard even poor acoustic environments.
The vocals should be heard nowadays even in mono with the loudspeakers of a cheap mobile phone, because mostly people listen to the vocals, not the instruments, which is a pity for us instrumentalist.

I'm using SoundID Reference from Sonar, both to calibrate my headphones I'm mixing with (not to disturb others at home) and to check, how my master mix sounds in cars, TV-sets, mobile phones and lap tops using their loudspeakers. It works quite well. https://www.sonarworks.com/soundid-reference/integrations/audient-oria-mini

How you cope with this issue?

PS. I opened up a new thread for this topic, because the discussion in my last thread went to Apple production failures and didn't get comments on this issue.