Absolutely. Blizzard's systems are designed to detect this and will issue a permanent ban to your account, which can also prohibit you from creating a new one if tied to the same phone number.
Even if these tools worked (which they don't), bypassing the unlock system defeats the purpose of Overwatch 2's progression design. The gradual hero unlock process serves a real purpose: it helps you learn each character's abilities and playstyle before moving on to more complex heroes. overwatch 2 unlock all tool top
Many websites offering these tools require you to input your Battle.net username and password directly into their interface to "sync" the unlocked items to your profile. Providing this information hands total control of your account over to malicious actors, who will change the recovery email, strip the account of legitimate assets, or resell it on the black market. Legitimate Ways to Unlock Cosmetics in Overwatch 2 Absolutely