May I ask with the utmost respect what thr belief is regarding not drinking coffee, black tea or soda?
I can share some of my thoughts here. Feel free to ask more questions or private message if you prefer.
As I recall Joseph Smith as a youth refused alcohol even when a Dr suggested it for pain when performing a surgical procedure on Joseph's leg. The word of wisdom was recorded later and IF you believe Joseph Smith was a prophet, he was speaking for the Lord there, which is why many lds members take it so seriously.
As with any teaching there can be a difference between what was spoken, how it was understood at the time, and how it is understood 100 or more years later. There can of course also be people falsly claiming to speak for YHWH and adding to His revealed will.
I grew up using herbs and nutrition rather than drugs and surgeries. Perhaps because of western medicine not being a trusted part of our family culture I have long seen a glaring inconsistency in mormons (from my perspective) in that they refuse alcohol, and coffee, tea, or soda with caffeine in them, but frequently have a "medicine cabinet" full of man made substances that are far more damaging to the body.
They do not have a hard and fast rule per se on coffee and tea or any caffeine for that matter.
This is true, in that you will not get kicked out of the church for not obeying the word of wisdom, but members are judged by other members to some degree.
My dad was up for a visit and seemed shocked that we were making and drinking coffee. I told him that it's just "bean tea" to me, and explained it is cheaper then the instant hot drinks for a large family like ours. I love and appreciate my dad. I don't pick on him or judge him per se for his choices, like being vaccinated, or taking prescriptions that I believe hurt his health, but I do tell my older children why I have made different choices.....and why we prefer to fellowship with members of many denominations, but will not "join" one.