From the ATAC website:
https://www.atac.roma.it/en/modernisation-of-rome's-metro-line-a
If unfamiliar with the metro, see the map of lines A and B on this site; ignore line C as it's under construction and you're unlikely to want or need the segments which are finished anyway.
https://www.atac.roma.it/docs/default-source/mappe-tpl/mappa-metro-e-ferrovie-metropolitane.pdf?sfvrsn=e1e83890_14
Looks like they're hoping not to disrupt service during prime sightseeing and work hours but if you planned on using this line later in the evening, it might be good to be aware of early closures? Be aware of work on tram Line 8 as well; will be replaced by bus for the next 9 months or so.
https://www.atac.roma.it/en/media/news/2022/06/28/atac-modernisation-of-tram-line-8
https://www.atac.roma.it/docs/default-source/mappe-tpl/mappa-linee-tranviarie.pdf?sfvrsn=ddffb109_6