I'm sorry that I have no good way to help you. I can only think of an account that runs two different platforms at the same time but has the same content. But I think it may be very tiring for you.
There are ways to create Twitter and you can find it, but there are relatively few successful people.
Tumblr doesn't seem to be very famous here compared with Twitter and X? I'm not sure about this. Sorry, I'm a little useless.（TAT）
