Never heard of it, sounds like a very nice minhag.
The German Jews had (some still have) a minhag that the chosson and kallah meet the morning of the wedding, with the chosson and kallah walking down an aisle holding hands or arms to sit under a canopy. Known as “Chuppah de Mein”, it is written up extensively in the wonderful series “Shorshei Minhag Ashkenaz”