For Sony Xperia XA2 and later, I think that you will find Androxyde Flashtool superceded by NewFlasher which is a lot simpler to utilise (provided you don’t mind losing your data as further intervention required to save it), although still requiring Xperifirm within Flashtool to obtain firmware images:https://www.teamandroid.com/2019/08/30/download-newflasher-xperia-flash-tool/