I noticed some small vertical cracks near my front steps—should I be worried or is that normal settling? Also, how can I tell if the mortar is still in good shape? Mine feels a bit crumbly in spots. Thanks!

https://highstylife.com/why-are-my-bricks-turning-black-what-every-brick-homeowner-needs-to-know/

I noticed some small vertical cracks near my front steps—should I be worried or is that normal settling? Also, how can I tell if the mortar is still in good shape? Mine feels a bit crumbly in spots