Biden and the USA has the tools to permanently take out the Kerch bridge, namely the ATACMS but they won't give it to Ukraine, at least not yet.
Apparently the the USA has sent the earlier M39 APAM (Anti-Personnel/Anti-Materiel) missile to Ukraine, which are an older version of the ATACMS. The APAM missiles can travel 100 miles and carry warheads containing hundreds of cluster bomblets. Which is all good, but Ukraine needs the long range, bridge-busting M48 or M57 variants, with ranges up to 300 km and a solid warhead. These are not being offered by Biden, yet.
The M48 version replaces the M39A1’s 950 submunitions with a single 500-pound penetrating warhead. Where the M39 is an area weapon, the M48 is a bridge-killer.
www.forbes.com