I will keep this brief so google translate has more of a chance to get it right
having 192.168.2.0/24 on either side of the tunnel can work but you need to make sure that you are using proxy-arp=
https://wiki.mikrotik.com/wiki/Manual:IP/ARP#Proxy_ARP and that you do not have overlapping IP addresses. Remember that you will still need layer 2 connection up to the proxy arp interface
Second option, change one local subnet, from there you will need to implement a route on each side of the tunnel going to the others local subnet as well as in the CHR
you can get remove some of the routes that are needed for this by adding nat's instead but this is only good for sites where you want to dial in to look at cameras etc as the site would not be able to dial out (cos it doesnt have the route)