Whether it can be solved
The answer is usually Yes (the probability of estrangement can't be solved is very small), because as the saying goes, "tiger poison doesn't eat children", parents usually love their children forever.
Reason finding
To solve the problem, you have to tie the bell. You have to think about why there is a gap between you and your parents, and find out the reasons to deal with it. (in fact, some of them don't need to explain that they are the closest parents after all.).
Solution 1 - talk
Have a heart to heart talk with your parents to deal with the estrangement. If you haven't seen them for many years, you can often go home to have a look.
Solution 2 - eat together
Make a delicious meal for your father and mother, do your filial piety and eliminate the estrangement at the same time.
Solution 3 - birthday
If your parents' birthday is coming, it's more meaningful to celebrate it for them.
Solution 4 - give gifts
Give some small gifts or things your parents need, your father and mother of course know the meaning.