Yes, UAC simply takes LSR information from each university and publishes it on its equivalent page for each degree. This is because each university sets its own LSR requirements for its degrees. It is common for universities to change their LSR requirements each year (that is, once all offer rounds are over) based on elements such as the demand for their degrees (where a stronger demand typically leads to increasing the LSR requirement for a degree, and vice versa). However, it is not common for them to change their LSR requirements between rounds.
The element that does change between rounds is the number of places available for a particular degree. Earlier offer rounds are usually those where the number of available places is the highest, meaning that applying for a particular degree in an earlier round (assuming that the LSR requirement for that degree has been met) would maximise the applicant's chances of receiving an offer for that degree. On the other hand, subsequent rounds typically mean a lower number of available places because a number of offers would have been made in the earlier round(s). This would suggest an inherently lower chance of being made an offer, especially if the demand for a degree remains high in subsequent rounds.
I hope this helps!
