Additional SQL Server features and topics not covered by specific categories
If no such feature, then consider two alternatives:
-- Method 1
declare @s as varchar(max)
set @s = CONVERT(CHAR(20), CURRENT_TIMESTAMP, 22)
set @s = STUFF( @s, PATINDEX('%:[0-9][0-9] [AP]M', @s), 3, '')
select @s
-- Method 2
select FORMAT( CURRENT_TIMESTAMP, 'dd''/''MM''/''yy h'':''mm tt')
The date part can be removed if not needed.