According to "Welt", companies active in construction, rail infrastructure, digitalization and the energy industry are considered to be beneficiaries of the debt pact. So-called green sectors are also likely to benefit.
A few examples:
$FAST (-2,38%) - Fastned
$ACC - Aker Corp
$IOS (+1,26%) - Ionos
$KTN (+1,2%) - Kontron
$NDX1 (-0,24%) - Nordex
$BC8 (-0,35%) - Bechtle
$VOS (+0,13%) - Vossloh
$S92 (-0,35%) - SMA Solar

Despite all the debt euphoria, however, investors should bear in mind that the infrastructure companies are smaller stocks that are not without risk.
Source (excerpt) & chart: World

