Q.wild violets
Can violets tolerate being planted under pine trees?
Wild Violets actually do really well in light shade and they're extremely resilient so they should be fine (and may actually do really well). Try not to plant them too close to the tree trunk. Having said that: especially if nothing else will grow underneath the pines, Violets may need some care until they're well-established.
These articles may help you:
https://www.gardeningknowhow.com/ornamental/bulbs/violet/wild-violets-care.htm
https://www.gardeningknowhow.com/ornamental/bulbs/violet/wild-violets-care.htm