Replace crankshaft oil seal (after new head gasket)

[steeeee]

I had a new timing belt fitted last year and had the cylinder head reskimmed due to leaking head gasket.

The garage is now replacing the crankshaft oil seal due to another oil leak. Is the crankshaft oil seal something that would have been checked when the head gasket was changed and/or should it have been replaced at the same time.

Just wanting to know if these are all items are related or not.

Many thanks

[steeeee]

Thanks all for the quick reply.
They've not said if front or rear, but good to know not related,