Covid +ve and tongue slurring. Surgery?

My mother is biabetic and hypertensive prsn..bt mostly prsr is under 140/90 and diabetes btwn 150-200(both ff/pp)...but sddnly 1 mnth ago both went high sugar intially went to 340(random) and prssr was about 160/90...thz wr fluctuating for 15 days..and suddenly tongue strtd to slurred...but thr was no issue of one side numbess; dizzyness or anythng.. We admmtd her and she was covid +ve..CT scan of brain was done and it was normal..Both MR and Angio of brain showed no abnormality.. Only issue was found in MR angio  of neck.. It was written -"Soft tissue intensit plaque in proximal part of ryt intrnl carotd artry causing mild luminal narrowing". She recovered very fast and rlzd aftr 1 week No issues thr aftr...she is fine now.. Sugar/prssr are also cntrld. Is mild nwrrwng of carotid arty a real concern..does it require surgery??? She is taking clopivas ap 75; atorva 40 and othr sugar/prsr medicine