Alchemist Sapper and Extra Discovery feat

[nabi]

Can an Alchemist Sapper qualify for the Extra Discovery feat at level 1 since it gains a discovery at first level?

[Tyrant Lizard King]

Unfortunately no. The feat requires the Discovery class feature which the Alchemical Sapper does not get until level 2 as normal. The Demolition Bomb modifies the Bomb class feature.