I have a doubt. So ATAC Seq will only give information about where DNA is accessible. but will not give information due to which epigenetic changes it has open? that means I will have to further perform meth seq or chip seq to know locations of DNA methylation or histone methylation?
ATAC-seq only tells you regions of open chromatin. You need to integrate ChIP-seq data or CUT&RUN data of histone PTMs to identify which histone marks are associated with that region