"Bonding" of 2 wireless links

Our network is fed by fiber with the last few miles a wireless link (not MT), then our MT router running BGP. We need more wireless capacity and would like to add parallel link to boost capacity.

There is no router prior to the radio link, although there is a managed switched.

Via BGP (or anything else for that matter) is it possible to create another session across a new link to a differ address from the same upstream provider and share the traffic across the 2 links? The router is close to retirement as it is running at 80%

Any help would be great

Thanks