Present Perfect – Is ‘Have Been Concerned’ Present Perfect?

Both are grammatically correct and in common use. There is nothing about the Present Perfect Continuous tense to requires it to end with "since...". It would be fine to write simply "She has been working." without any extra clause.

The choice of tense depends on what exactly you want to say.

If she has been working in a bank for five years, then she started at least five years ago and has continued until now and she continues to work. This is a little redundant in this example because you have already said the she currently works in a bank.

If she has worked in a bank for five years, that could have been any five years in the past. Maybe she worked for four years a decade ago and has come back to work for the last year.

1. There is no requirement to repeat the auxiliary verb when the verb phrase contains more than one lexical verb joined as these verbs are by and.

I've tidied my room and [I've] washed the windows.

2. kicked in my face is a participle clause. kicked is not tensed but expresses a state or condition of sand.

Compare:

I like food cooked in oil and food cooked on a grill

Another way of understanding kicked in my face is that it is a special kind of complement modifying the object of the verb had:

I have had [I have experienced] sand ^object {kicked in my face}.

But it's really no different from:

I have eaten food cooked on a grill.

But in either analysis kicked is not tensed. The phrase pertains either to sand alone or to sand as object of the verb.

3. You brought me fame.

I have never looked at the lyrics of that song carefully, but I would suppose that this sentence is describing something that happened in the past, not the current status of the speaker. Although the fame might persist to the present moment, the becoming-famous, the being-made-famous, happened in the past.

4. Your understanding of will is too rigid and limited.
   We're gonna is an approximation of how "we're going to" is pronounced in normal colloquial speech where the speaker is not trying to articulate the words according to how they're spelled. We're going to and we will are two equally viable ways of forming a statement about an intention to do something in the future.