We went forward facing once our 2 were out of the maxi-cosi rear facer we had (pretty sure that’s a group 0).
We bought a Kiddy Infinity Pro it is a very different bit of design from most forward facing seats. It works by restraining and supporting the child with a bolster and not straps. It secures in place with a 3 point belt that holds the seat and the bolster. Looks pretty weird but second child is in it and we cannot find fault.
They are light, easy to fit and were highly rated by which?, especially for non ISOfix cars.
I know it’s not rear facing but its a good alternative to some of the other forward facing stuff when they’re still small and it covers them up to about age 3.