Are there any resource planning platforms that focus on capacity planning for delivery managers?

Yes — there are several resource planning / capacity planning platforms that are well suited for delivery managers who need to forecast team availability, balance workloads, and spot bottlenecks before they become problems.

Platforms commonly used for this

• Float — strong for high-level resource scheduling and utilization tracking.
• Mosaic — geared toward capacity planning, forecasting, and staffing visibility.
• Forecast — combines resource planning with project financials and capacity forecasting.
• Resource Guru — simple and effective for managing team availability and allocations.
• Runn — especially good for forward-looking capacity planning and scenario modeling.
• Kantata — more enterprise-focused, useful for delivery and services organizations.
• Smartsheet / Monday.com / ClickUp — can be adapted for capacity planning, though they’re not purpose-built in the same way.

What delivery managers usually want in these tools

• Team and individual capacity vs. allocation
• Utilization forecasting
• Ability to plan by role, skill, or project
• Scenario planning for future demand
• Early warning on overbooking
• Reporting for delivery risk

Good fit by use case

• Simple scheduling and visibility: Resource Guru, Float
• Forecasting and scenario planning: Runn, Mosaic, Forecast
• Enterprise services delivery: Kantata

If you want, I can also give you:

1. a shortlist by team size,
2. a comparison table, or
3. tools specifically built for agency / consulting / software delivery teams.