It has happened, sure, but it is not normal in today's age. Non-COVID and post-lockout seasons:
2022 COL 119
2019 STL 99
2018 WAS 105
2017 PIT 118
2016 PIT 104
2015 CHI 102
2014 LA 100
etc., and I think if you look at the runners-up, you'll see a similar pattern. Of course, this means that many other teams with 100 points did not win, because the majority of playoff teams have 100 points of more, every year.