Somehow, there are always misunderstandings, no matter what you try. That was a quote from red51 who listens to players' problems and tries to help them with changes and innovations in an upcoming update.
I don't understand the reference to your sister either. If she doesn't write here anymore, why do we constantly hear from her? Whether the server admin is there or whether she is there has nothing to do with building problems. What can we do in this case here in this forum? Absolutely nothing. As mentioned a few times, this is your problem. Please ask these questions in a way that can be answered.
I built domes and arches, roads with curves in the old Java version, something almost nobody could do back then.
Everything is possible to build, you just have to try, and that doesn't mean giving up right away, but rather trying for a long time if you really want to. Some things are difficult, but they work, don't give up right away.
And as I said, we can't do anything if this or that player isn't there on your server. What does this have to do with us here in this forum? I don't understand the connection, and neither do the others here.
Please phrase your questions in a way that allows them to be answered. Referring to people on your server is too confusing and has nothing to do with the question about building. We're happy to help, but we won't find a solution this way.