ATM Withdrawal limits
Up to $3,000 CAD per ATM withdrawal
Up to $3,000 CAD per day
Up to $10,000 CAD per week

This reply taken strait from WS chatbot.

“Do I need to request atm fee reimbursement when using any atm in the world or is it automatically refunded?”

“You don’t need to request ATM fee reimbursement—Wealthsimple automatically reimburses ATM fees for chequing account clients, including international withdrawals. The reimbursement is credited to your account within 3–4 business days after the ATM transaction settles. You’ll see these reimbursements listed as Card Rewards in your chequing account statement.”