Stock lending rates

Does anybody know where I could find the stock borrow rates that wealthsimple uses? I’ve been noticing on my lending confirmations that the stock borrow rates from WS are significantly lower than the reported borrow rates from IBKR, and wanted to check where the WS rates come from.

I had one case on BRLS stock where the borrow rate was 200% lower on the lending confirmation date than the lowest reported rate for the day from ibkr. So I’m a bit concerned.

Thanks all!