Allow for uses of $1, $2 within REGEXP_REPLACE

Hello,

In MySQL, it's possible to do the following query:

SELECT REGEXP_REPLACE("abc", "a(b)", "$1");

which will give the result of

bc

In MariaDB, this similarly can be done with two backslashes:

SELECT REGEXP_REPLACE("abc", "a(b)", "\\1");

However, would it be possible to allow REGEXP_REPLACE to also use the $ syntax so that there's syntax compatibility between the two database engines?

Thanks.