Hierarchical XML data to JSON format

I'm trying to create JSON format output from the below hierarchical data, by first converting the data into XML and then to JSON. In the XML output I'm seeing special characters (<,",> replaced with < " >).

mi_check_pt_rout_key_n is considered as parent key.

Running the below code will help to reproduce the issue in getting escape sequences (< " >) in the XML output.

Can someone please suggest me

  1. how to address the escape sequences (< " >) in the XML output?
  2. how to format the output in JSON

CREATE TABLE meas_loc (enty_key bigint,mi_check_pt_rout_key_n bigint,mi_check_pt_pred_key_n bigint,MI_MEAS_LOC_SEQ_N FLOAT);
CREATE TABLE chkp_cond (enty_key bigint,mi_chkpcond_rout_key_n bigint,mi_chkpcond_pred_key_n bigint,MI_CHKPCOND_SEQ_NUM_N FLOAT);

INSERT INTO meas_loc (enty_key,mi_check_pt_rout_key_n,mi_check_pt_pred_key_n,MI_MEAS_LOC_SEQ_N) VALUES (64251803159,64251705940,64251705940,1);
INSERT INTO meas_loc (enty_key,mi_check_pt_rout_key_n,mi_check_pt_pred_key_n,MI_MEAS_LOC_SEQ_N) VALUES (64251802979,64251705940,64251705940,2);
INSERT INTO meas_loc (enty_key,mi_check_pt_rout_key_n,mi_check_pt_pred_key_n,MI_MEAS_LOC_SEQ_N) VALUES (64251802983,64251705940,64251705940,3);
INSERT INTO chkp_cond (enty_key,mi_chkpcond_rout_key_n,mi_chkpcond_pred_key_n,MI_CHKPCOND_SEQ_NUM_N) VALUES (64252166584,64251705940,64251802983,1);
INSERT INTO meas_loc (enty_key,mi_check_pt_rout_key_n,mi_check_pt_pred_key_n,MI_MEAS_LOC_SEQ_N) VALUES (64252166585,64251705940,64252166584,1);

create table lubr_chkp (enty_key bigint, rounte_key bigint, parent_key bigint, enty_seq float, chkp_cond nvarchar(6))

;with t as ( select enty_key,mi_check_pt_rout_key_n rounte_key,mi_check_pt_pred_key_n parent_key,MI_MEAS_LOC_SEQ_N enty_seq, 'true' chkp_cond
from meas_loc
union all
select enty_key,mi_chkpcond_rout_key_n rounte_key,mi_chkpcond_pred_key_n parent_key,MI_CHKPCOND_SEQ_NUM_N enty_seq, 'false' chkp_cond
from chkp_cond
insert into lubr_chkp (enty_key , rounte_key , parent_key , enty_seq, chkp_cond )
select enty_key , rounte_key , parent_key , enty_seq, chkp_cond from t

drop function SelectChild
CREATE function SelectChild(@key as bigint)
returns xml
return (
CONVERT(varchar(100), CAST(enty_seq AS float)) as "@SeqNum",
enty_key as "@EntityKey",
chkp_cond as "@IsCheckpoint",
isnull(CONVERT(varchar(max), cast(dbo.SelectChild(enty_key) as xml)),'null') as "@ListDirectChildren"
from lubr_chkp
where parent_key = @key
order by enty_seq
for xml path('entity'), type

select cast(
CONVERT(varchar(100), CAST(enty_seq AS float)) as "@SeqNum"
,enty_key AS "@EntityKey"
,chkp_cond as "@IsCheckpoint"
,isnull(CONVERT(varchar(max), cast(dbo.SelectChild(enty_key) as xml)),'null') as "@ListDirectChildren"
FROM lubr_chkp
WHERE parent_key = 64251705940
order by enty_seq
FOR XML PATH ('entity'), type) as varchar(max))

I'm trying to get JSON format output as below: