As a Canadian, for L-1Bs adjudicated by CBP at a Canadian port of entry, how long does it typically take for USCIS to send the I-797 approval notice after processing? CBP officials have not shared the tracking number for USCIS tracking (WAC #) during the border processing and hence there's radio silence on the processing. Do you recommend international travel and re-entry to the US with just the endorsed I-129S, passport stamp, and current I-94, without any problems?
Thank you!