Try this first
Keep your dose the same and grind slightly coarser. Taste the next shot.
Why this can help
An overly restrictive puck can slow water flow and produce an unbalanced cup.
What to try next
Clean the basket and check for an overfilled dose if the flow stays slow.
Related skills: Grind and espresso. Explore the Home Barista Roadmap for more context.
Every coffee and setup behaves a little differently. Make one change, taste, and keep the result that works for you.