No DAF, the SNP are not the government of Scotland. They a devolved administration with limited powers restricted to internal affairs. The government of Scotland is the UK parliament which the Scottish people elect MPs to. The UK parliament would need to legislate to allow another referendum and they won’t. Any attempt by the SNP to hold a referendum would be illegal.
On another note The EU would not allow a breakaway Scotland to join the EU. Remember how they supported Spain in preventing Catalonia from holding a referendum. The EU would see such an event as putting the whole EU at risk.