No, that isn’t accurate.
The Republic has serious concerns about the UK reneging on its solemn oath as part of the good Friday agreement, so they are voicing it.
The other 26 countries are supporting Ireland as that’s what the club does, supported its members.
The EU best interests are what its members want and keeping the four freedoms.
My understanding is that Boris has spent considerable time working this out with NI and mainland Ireland. That being said if Ireland works out a bilateral agreement with the UK would that be a violation of EU rules ?