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 (-2.75%) - Fastned
$ACC (-20.63%) - Aker Corp
$IOS (-3.84%) - Ionos
$KTN (-3.88%) - Kontron
$NDX1 (-0.04%) - Nordex
$BC8 (-3.21%) - Bechtle
$VOS (-3.19%) - Vossloh
$S92 (-2.39%) - 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