They strap everything down first, then make videos about what it's like to be in a significant amount of microgravity when the ISS gets reboosted.
The term "microgravity" prima facie admits that there is non-zero gravity or acceleration, and micro just indicates that it's small.
Microgravity environments admittedly have some acceleration. It's just that it's quite small compared to 1 g gravity on Earth.
When we are talking about how astronauts experience the acceleration during the altitude boost maneuver, we can say (if we want to) that they experience "a significant amount of microgravity".
Can we say that? Can we suggest that there can be an amount of microgravity, that it is smaller in some cases and larger in others? If so, does higher/lower microgravity mean more/less acceleration, or less/more? Is the state of minimum acceleration "high microgravity" or "low microgravity"?