Hi everyone, how are you?
I have a simple suggest, but i think will be very useful and anyone will like.
So, my suggestion is when the vendor send the tracking code and url to email, send this too
a custom template on customer panel (on order referent).
Like this pic:https://imgur.com/gsLT5yY (code on left; button with tracking_url on right).
this will be facilitate the customer view on which order their tracking codes.
Please take a look on this plugin, it has this function (but here the admin include tracking code and url its a local shipping method):
https://wordpress.org/plugins/woocommerce-correios/.
https://github.com/multivendorx/dc-woocommerce-multi-vendor/issues/931