Barring that the head gasket or the cam cover seals were leaking, there are two places that couldleak at the front, the front seal and the cam chain tensioner plug.
I suggest you change both regardless.
For the tensioner plug you can fab something yourself or buy a new original, or John-John sels a very good from aluminium.
As for the front seal, it’s very easy once you remove the pulley.
I found a Viton seal that fits and a separate seal as a dust cover, it worked fine.
I have an extra one I could sell, PM If you are interested.