Would it be alright to break down the Acknowledgements into sections? Would it be alright to break down the acknowledgements of a thesis into a few small sections with individual section headings?
For example:

Academic and Professional Acknowledgements
Personal Acknowledgements
Funding Acknowledgements

This is because I have seen some long acknowledgements and I was wondering whether breaking down the acknowledgements in this manner would help organize the components better?
In the event that someone plans to read my thesis (such as for a potential post-doc position), I assume that they might at least skim through the acknowledgements to see the academics/researchers I have worked with and also the funding received. Therefore breaking down the acknowledgements into smaller sections might make it easier. However I have not seen this done so I was wondering whether it would be an acceptable thing to do or whether it might be frowned upon?
Provided that you don't get pushback from your advisor or committee, I think it should be fine. Those are the main concerns about style for a dissertation. If you send it out for publication, the editor may accept it or not.
But write it they way you think it should be and consider any advice you get from folks that have influence over you.