Why are numbers not enclosed in quotation marks when NormalizeText ؟

I am trying to make NormalizeText But there is a part in the output, which is the numbers, which are not enclosed in quotation marks, and they are the last lines in the code. this is my code

 public static string SerializeAndNormalizeReceipt(object receipt)
 {
     if (receipt == null)
         return string.Empty;

     string serializedData = JsonConvert.SerializeObject(receipt, Formatting.None);

     string normalizedData = NormalizeText(serializedData);

     return normalizedData;
 }

 public static string NormalizeText(string text)
 {
     if (string.IsNullOrEmpty(text))
         return string.Empty;

     string cleanedText = Regex.Replace(text, @"[:,]", "");

     string normalizedText = Regex.Replace(cleanedText, @"[a-z]", m => m.Value.ToUpper());

     normalizedText = Regex.Replace(normalizedText, @"[u0600-u06FF]+", m => m.Value);

     normalizedText = Regex.Replace(normalizedText, @"[{}[]]", "");

     normalizedText = Regex.Replace(normalizedText, @"s+(?=[a-zA-Z0-9])", "");

     return normalizedText;
 }

and this is my output

"HEADER""DATETIMEISSUED""2024-12-30T173749""RECEIPTNUMBER""HAZ002""UUID""""PREVIOUSUUID""""REFERENCEOLDUUID""""CURRENCY""EGP""EXCHANGERATE"0"DOCUMENTTYPE""RECEIPTTYPE""S""TYPEVERSION""1.2""SELLER""RIN""332460843""COMPANYTRADENAME""سعاد محمد صالح حسن""BRANCHCODE""ABC""DEVICESERIALNUMBER""CWX02618""ACTIVITYCODE""8620""BRANCHADDRESS""COUNTRY""EG""GOVERNATE""CAIRO""REGIONCITY""CITYCENTER""STREET""16STREET""BUILDINGNUMBER""14BN""BUYER""TYPE""F""ID""313717919""NAME""TAXPAYER1""MOBILENUMBER""+201020567462""PAYMENTNUMBER""987654""ITEMDATA""INTERNALCODE""NA""DESCRIPTION""MEDICALCAREFORTHEELDERLY""ITEMTYPE""EGS""ITEMCODE""EG-332460843-M3""UNITTYPE""EA""QUANTITY"1"UNITPRICE"200"NETSALE"200"TOTALSALE"200"TOTAL"200"COMMERCIALDISCOUNTDATA""AMOUNT"0"DESCRIPTION""NODISCOUNT""RATE"0"ITEMDISCOUNTDATA""AMOUNT"0"DESCRIPTION""NODISCOUNT""RATE"0"TAXABLEITEMS""TAXTYPE""T1""AMOUNT"28"SUBTYPE""V009""RATE"14"TOTALSALES"200"TOTALCOMMERCIALDISCOUNT"0"TOTALITEMSDISCOUNT"0"EXTRARECEIPTDISCOUNTDATA""AMOUNT"0"DESCRIPTION""NODISCOUNT""RATE"0"NETAMOUNT"200"FEESAMOUNT"0"TOTALAMOUNT"228"TAXTOTALS""TAXTYPE""T1""AMOUNT"28"PAYMENTMETHOD""C""ADJUSTMENT"0"CONTRACTOR""NAME""CONTRACTOR1""AMOUNT"0"RATE"0