Think of dysphoria as like frustration. Our gender is incongruent with our birth sex, so while we are experiencing things incongruent with our gender identity, our frustration builds, then when we are experiencing things affirming our gender identity, frustration fades. When we are sufficiently distracted, we aren't aware of the incongruence, so frustration doesn't increase.
So, at busy times we may not be aware of frustrations (dysphoria) but then we might do something which is triggering our frustration (dysphoria) and maybe then we might do something affirming which will reduce frustration. Our dysphoria rises and falls with how aware we are of triggering or affirming things, but it can be neutralised while we are distracted with other things.
Dysphoria need not be anything painful, it can be just an unidentified background feeling, sometimes called 'noise'. It can be just not being able to enjoy things fully, and anything up to debilitating feelings or urges. We learn to identify it by trial and error on what triggers it and what reduces it. Once you understand it, you can recognise what to avoid to minimise attacks, and what to do to reduce them.
hugs,
Allie