Tax Loss Harvesting using two demat

I have a basic understanding of the concept of Tax Loss Harvesting, but we have to wait two days atleast to buy back the same shares and book loss.

So, can I use two of my demat accounts to do this on the same day. So for example, I have one account in Zerodha where I hold 50 shares of Icici Bank at 450 price. Suppose it is now trading at 350. Can I sell my Zerodha’s 50 shares and buy the same at my other demat account, say Upstox, all within the same day??

Following this. Someone please advise.
Thank you

I dont think there is a specific wait period required before buying back for tax harvesting. It is just the settlement cycle. So you can buy back in different demat accounts immediately I suppose.