Frankly, I think that's a much wiser approach than escalating the situation further with DDos attacks.
The cost of inaction has gone up, and up, and up. Now the Ukrainian people are paying that price in blood and subjugation. How much higher should we allow it to go?
DDOS-ing a website is nonviolent. Severe, crippling economic sanctions are nonviolent. We should wage all-out economic war and accept the costs, which will be real and painful. Gandhi and other pacifist leaders didn't advocate inaction, he advocated forceful and determined nonviolent action that caused as much inconvenience and difficulty for his opponents as possible. We should at least be doing that, surely?
P.S. I don't care about downvotes. I'm surprised the account is not shadow banned.