You nee to read about work, POW is only <1min each 3h on 100 block, look at https://explorer.zilliqa.com/home

also you can test miner with zilminer -M 1
there is bunch of options to debug it, its ethfork so same commands
-U force cuda
-G force opencl

zillminer --help

Also set --report-hr=1 for pool to see hashrate per miner/worker

example:
zilminer -P zil://0x212eccf2cccdecb1880e058ec40b21dd36f47c85.glavni@rudnik.hopto.org:5000/api --ergodicity 2 --report-hr=1 --pow-start kill.bat --pow-end beam.bat --clear-dag

kill.bat:
taskkill /F /IM miner.exe

beam.bat
START cmd /c "c:/miner/miner.exe --algo 150_5 --server beam-us.leafpool.com --port 4444 --ssl 1 --user walletxxx.namexxx"