EDIT :
Due to the solution I had previously provided not being applicable to everyone who faced the issue I decided to change my answer to the more universal (tried & tested) approach of solving it, i.e using scale:
<com.airbnb.lottie.LottieAnimationView
android:id="@+id/my_animation"
android:layout_width="100dp"
android:layout_height="100dp"
android:scaleX="5"
android:scaleY="5"
app:lottie_fileName="animation.json"
app:lottie_autoPlay="false"/>
The android:scaleX="5"
is the key here.
OLD ANSWER
I recently had the same problem and I resorted to using a negative padding which increased the size of the animated item inside the view
<com.airbnb.lottie.LottieAnimationView
android:id="@+id/my_animation"
android:layout_width="100dp"
android:layout_height="100dp"
android:padding="-10dp"
app:lottie_fileName="animation.json"
app:lottie_autoPlay="false"/>
Increase or decrease the value of the padding to get desired size of the animation.