Hello it's possible use a same IP Pool for múltiple pppoe servers?

Yes

To expand on this is little:
- if you want to use a single pool ("/ip pool" on RouterOS) for multiple PPPoE servers on a single RouterOS system (single RB / CCR / CHR), you can, just configure it in the profiles / secrets
- if you want to use a single IP "pool / range" shared across multiple separate systems (multiple RBs / CCRs / CHRs), you will need a Radius server that centrally manages and gives out IPs to the various PPPoE servers