Hello Lindee,
I believe there would be 2 different solutions for this matter:
1. KEEP SENDING THE PASSWORD VIA EMAIL
If you really want to keep sending the password via email you could try to:
– Disable “Send as a separate email” option
– Disable “Delay standard WooCommerce customer new account email”
2. DO NOT SEND THE PASSWORD VIA EMAIL
If it’s a reasonable scenario for you to stop generating the password automatically and consequently stop sending it via email, you could simply try to:
– Disable “When creating an account, automatically generate an account password” on WooCommerce > Accounts & Privacy
Let me know what you’ve tried and if it worked 😉